/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:26:04,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:26:04,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:26:04,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:26:04,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:26:04,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:26:04,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:26:04,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:26:04,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:26:04,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:26:04,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:26:04,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:26:04,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:26:04,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:26:04,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:26:04,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:26:04,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:26:04,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:26:04,517 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:26:04,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:26:04,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:26:04,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:26:04,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:26:04,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:26:04,754 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:26:04,755 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:26:04,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2021-07-09 17:26:04,756 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2021-07-09 17:26:04,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:26:04,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:26:04,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:26:04,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:26:04,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:26:04,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:26:04,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:26:04,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:26:04,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:26:04,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... [2021-07-09 17:26:04,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:26:04,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:26:04,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:26:04,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:26:04,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:26:04,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:26:04,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:26:04,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:26:04,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:26:04,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:26:04,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:26:04,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:26:04,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:26:04,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:26:04,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:26:04,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:26:04,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:26:04,922 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:26:05,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:26:05,220 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-09 17:26:05,221 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:26:05 BoogieIcfgContainer [2021-07-09 17:26:05,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:26:05,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:26:05,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:26:05,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:26:05,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:26:04" (1/2) ... [2021-07-09 17:26:05,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2634f4 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:26:05, skipping insertion in model container [2021-07-09 17:26:05,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:26:05" (2/2) ... [2021-07-09 17:26:05,226 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2021-07-09 17:26:05,230 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:26:05,230 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:26:05,230 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:26:05,230 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:26:05,291 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:26:05,312 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:26:05,333 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:26:05,334 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:26:05,334 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:26:05,334 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:26:05,334 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:26:05,334 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:26:05,334 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:26:05,342 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:26:05,355 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-07-09 17:26:05,368 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:05,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,375 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,375 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,378 INFO L82 PathProgramCache]: Analyzing trace with hash 480470199, now seen corresponding path program 1 times [2021-07-09 17:26:05,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650420148] [2021-07-09 17:26:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650420148] [2021-07-09 17:26:05,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650420148] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:05,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:05,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:26:05,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566150821] [2021-07-09 17:26:05,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:26:05,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:26:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:26:05,541 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,588 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2021-07-09 17:26:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:26:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,602 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:26:05,603 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:26:05,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:26:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:26:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2021-07-09 17:26:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2021-07-09 17:26:05,660 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2021-07-09 17:26:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,660 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2021-07-09 17:26:05,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2021-07-09 17:26:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:05,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,663 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:26:05,664 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2011052617, now seen corresponding path program 2 times [2021-07-09 17:26:05,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945432111] [2021-07-09 17:26:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945432111] [2021-07-09 17:26:05,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945432111] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:05,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:05,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:26:05,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942758238] [2021-07-09 17:26:05,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:26:05,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:05,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:26:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:26:05,713 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,734 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-07-09 17:26:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:26:05,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,737 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:26:05,737 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:26:05,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:26:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:26:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-07-09 17:26:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-07-09 17:26:05,755 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-07-09 17:26:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,755 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-07-09 17:26:05,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-07-09 17:26:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:05,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,756 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:26:05,757 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1571987321, now seen corresponding path program 3 times [2021-07-09 17:26:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903902567] [2021-07-09 17:26:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903902567] [2021-07-09 17:26:05,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903902567] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:05,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:05,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:26:05,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732078183] [2021-07-09 17:26:05,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:26:05,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:26:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:26:05,783 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,802 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2021-07-09 17:26:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:26:05,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,805 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:26:05,807 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:26:05,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:26:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-07-09 17:26:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-07-09 17:26:05,820 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-07-09 17:26:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,820 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-07-09 17:26:05,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-07-09 17:26:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:26:05,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,824 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:26:05,824 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1072995658, now seen corresponding path program 1 times [2021-07-09 17:26:05,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047260998] [2021-07-09 17:26:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047260998] [2021-07-09 17:26:05,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047260998] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:05,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:05,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:26:05,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037869283] [2021-07-09 17:26:05,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:26:05,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:26:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:05,958 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,997 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2021-07-09 17:26:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:26:05,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:26:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,999 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:26:05,999 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:26:06,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:26:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:26:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-07-09 17:26:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-07-09 17:26:06,004 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2021-07-09 17:26:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,004 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-07-09 17:26:06,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-07-09 17:26:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:26:06,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,006 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:26:06,006 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash 109698672, now seen corresponding path program 2 times [2021-07-09 17:26:06,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663126257] [2021-07-09 17:26:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:06,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663126257] [2021-07-09 17:26:06,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663126257] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:26:06,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188524868] [2021-07-09 17:26:06,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:26:06,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:26:06,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:06,093 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,192 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2021-07-09 17:26:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:26:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,194 INFO L225 Difference]: With dead ends: 372 [2021-07-09 17:26:06,194 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 17:26:06,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 17:26:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2021-07-09 17:26:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2021-07-09 17:26:06,202 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2021-07-09 17:26:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,202 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2021-07-09 17:26:06,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2021-07-09 17:26:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:26:06,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,203 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:26:06,203 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,204 INFO L82 PathProgramCache]: Analyzing trace with hash 984033998, now seen corresponding path program 3 times [2021-07-09 17:26:06,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992786155] [2021-07-09 17:26:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:06,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992786155] [2021-07-09 17:26:06,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992786155] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:26:06,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736287930] [2021-07-09 17:26:06,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:26:06,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:26:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:06,301 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,395 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2021-07-09 17:26:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:26:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,397 INFO L225 Difference]: With dead ends: 372 [2021-07-09 17:26:06,397 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:26:06,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:26:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2021-07-09 17:26:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2021-07-09 17:26:06,405 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2021-07-09 17:26:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,407 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2021-07-09 17:26:06,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2021-07-09 17:26:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:26:06,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,409 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:26:06,409 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash -505370998, now seen corresponding path program 4 times [2021-07-09 17:26:06,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202377625] [2021-07-09 17:26:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:06,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202377625] [2021-07-09 17:26:06,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202377625] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:26:06,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224453135] [2021-07-09 17:26:06,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:26:06,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:26:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:06,483 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,547 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2021-07-09 17:26:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:26:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,550 INFO L225 Difference]: With dead ends: 318 [2021-07-09 17:26:06,550 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:26:06,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:26:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2021-07-09 17:26:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2021-07-09 17:26:06,555 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2021-07-09 17:26:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,555 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2021-07-09 17:26:06,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2021-07-09 17:26:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:06,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,556 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:26:06,556 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash 621852817, now seen corresponding path program 1 times [2021-07-09 17:26:06,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915067644] [2021-07-09 17:26:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915067644] [2021-07-09 17:26:06,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915067644] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:06,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687804731] [2021-07-09 17:26:06,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:06,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:06,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:06,593 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,615 INFO L93 Difference]: Finished difference Result 291 states and 852 transitions. [2021-07-09 17:26:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,617 INFO L225 Difference]: With dead ends: 291 [2021-07-09 17:26:06,617 INFO L226 Difference]: Without dead ends: 291 [2021-07-09 17:26:06,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-07-09 17:26:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 183. [2021-07-09 17:26:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9835164835164836) internal successors, (543), 182 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 543 transitions. [2021-07-09 17:26:06,622 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 543 transitions. Word has length 19 [2021-07-09 17:26:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,622 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 543 transitions. [2021-07-09 17:26:06,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 543 transitions. [2021-07-09 17:26:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:06,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,623 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:26:06,624 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash 169661669, now seen corresponding path program 1 times [2021-07-09 17:26:06,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715454215] [2021-07-09 17:26:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715454215] [2021-07-09 17:26:06,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715454215] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408479264] [2021-07-09 17:26:06,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:06,670 INFO L87 Difference]: Start difference. First operand 183 states and 543 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,691 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2021-07-09 17:26:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,693 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:26:06,693 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:26:06,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:26:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2021-07-09 17:26:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-07-09 17:26:06,698 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-07-09 17:26:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,698 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-07-09 17:26:06,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-07-09 17:26:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:06,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,699 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:26:06,699 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,700 INFO L82 PathProgramCache]: Analyzing trace with hash 290495691, now seen corresponding path program 2 times [2021-07-09 17:26:06,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964370874] [2021-07-09 17:26:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964370874] [2021-07-09 17:26:06,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964370874] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:06,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126006260] [2021-07-09 17:26:06,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:06,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:06,727 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,783 INFO L93 Difference]: Finished difference Result 279 states and 798 transitions. [2021-07-09 17:26:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,786 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:26:06,786 INFO L226 Difference]: Without dead ends: 279 [2021-07-09 17:26:06,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:26:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-09 17:26:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2021-07-09 17:26:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-07-09 17:26:06,791 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-07-09 17:26:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,791 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-07-09 17:26:06,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-07-09 17:26:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:06,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,792 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:26:06,792 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -804203227, now seen corresponding path program 2 times [2021-07-09 17:26:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265131819] [2021-07-09 17:26:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265131819] [2021-07-09 17:26:06,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265131819] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:06,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352611157] [2021-07-09 17:26:06,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:06,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:06,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:06,834 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,894 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2021-07-09 17:26:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,896 INFO L225 Difference]: With dead ends: 333 [2021-07-09 17:26:06,896 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:26:06,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:26:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:26:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2021-07-09 17:26:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-07-09 17:26:06,902 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2021-07-09 17:26:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,902 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-07-09 17:26:06,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-07-09 17:26:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:06,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,904 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 17:26:06,904 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1069621049, now seen corresponding path program 3 times [2021-07-09 17:26:06,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640482115] [2021-07-09 17:26:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640482115] [2021-07-09 17:26:06,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640482115] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:06,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:06,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:06,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030496208] [2021-07-09 17:26:06,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:06,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:06,942 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,999 INFO L93 Difference]: Finished difference Result 280 states and 812 transitions. [2021-07-09 17:26:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,001 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:26:07,001 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 17:26:07,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 17:26:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 189. [2021-07-09 17:26:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-07-09 17:26:07,006 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 19 [2021-07-09 17:26:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,006 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-07-09 17:26:07,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-07-09 17:26:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:07,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,007 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 17:26:07,007 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1069276477, now seen corresponding path program 3 times [2021-07-09 17:26:07,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592338085] [2021-07-09 17:26:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592338085] [2021-07-09 17:26:07,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592338085] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:07,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:07,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:07,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131315699] [2021-07-09 17:26:07,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:07,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:07,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:07,039 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,069 INFO L93 Difference]: Finished difference Result 220 states and 628 transitions. [2021-07-09 17:26:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,070 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:26:07,070 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:26:07,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:26:07,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-07-09 17:26:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-07-09 17:26:07,074 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-07-09 17:26:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,075 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-07-09 17:26:07,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-07-09 17:26:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:07,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,077 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 17:26:07,077 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1821519765, now seen corresponding path program 4 times [2021-07-09 17:26:07,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979034743] [2021-07-09 17:26:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:07,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979034743] [2021-07-09 17:26:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979034743] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:07,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:07,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:07,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7799658] [2021-07-09 17:26:07,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:07,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:07,156 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,192 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2021-07-09 17:26:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,193 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:26:07,193 INFO L226 Difference]: Without dead ends: 195 [2021-07-09 17:26:07,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:26:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-09 17:26:07,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-07-09 17:26:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-07-09 17:26:07,197 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-07-09 17:26:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,197 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-07-09 17:26:07,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-07-09 17:26:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:07,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,198 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 17:26:07,198 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2086937587, now seen corresponding path program 5 times [2021-07-09 17:26:07,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956243647] [2021-07-09 17:26:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:07,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956243647] [2021-07-09 17:26:07,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956243647] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:07,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:07,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:07,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601547038] [2021-07-09 17:26:07,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:07,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:07,227 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,256 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-07-09 17:26:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:07,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,258 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:26:07,258 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:26:07,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:26:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-07-09 17:26:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-07-09 17:26:07,262 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-07-09 17:26:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,262 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-07-09 17:26:07,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-07-09 17:26:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:26:07,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,263 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-09 17:26:07,263 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1670174131, now seen corresponding path program 6 times [2021-07-09 17:26:07,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452973628] [2021-07-09 17:26:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:07,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452973628] [2021-07-09 17:26:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452973628] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:26:07,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:26:07,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:26:07,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076591355] [2021-07-09 17:26:07,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:26:07,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:26:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:26:07,287 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,311 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2021-07-09 17:26:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:26:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,330 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:26:07,330 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:26:07,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:26:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-07-09 17:26:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-07-09 17:26:07,334 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-07-09 17:26:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,334 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-07-09 17:26:07,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-07-09 17:26:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:26:07,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,334 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 17:26:07,335 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1170356842, now seen corresponding path program 1 times [2021-07-09 17:26:07,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436999254] [2021-07-09 17:26:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:07,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436999254] [2021-07-09 17:26:07,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436999254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188572919] [2021-07-09 17:26:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:26:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:07,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188572919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:07,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:26:07,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503596954] [2021-07-09 17:26:07,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:26:07,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:26:07,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:26:07,523 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,577 INFO L93 Difference]: Finished difference Result 313 states and 911 transitions. [2021-07-09 17:26:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:26:07,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:26:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,578 INFO L225 Difference]: With dead ends: 313 [2021-07-09 17:26:07,578 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:26:07,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:26:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-07-09 17:26:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-07-09 17:26:07,583 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 20 [2021-07-09 17:26:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,584 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-07-09 17:26:07,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-07-09 17:26:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:07,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,584 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:26:07,801 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash 141625355, now seen corresponding path program 2 times [2021-07-09 17:26:07,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575049226] [2021-07-09 17:26:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:07,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575049226] [2021-07-09 17:26:07,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575049226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345830911] [2021-07-09 17:26:07,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:07,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:26:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:07,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345830911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:07,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 17:26:07,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275289505] [2021-07-09 17:26:07,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:26:07,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:26:07,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:07,974 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:08,070 INFO L93 Difference]: Finished difference Result 367 states and 1066 transitions. [2021-07-09 17:26:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:26:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:08,072 INFO L225 Difference]: With dead ends: 367 [2021-07-09 17:26:08,072 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 17:26:08,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 17:26:08,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2021-07-09 17:26:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.932) internal successors, (733), 250 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 733 transitions. [2021-07-09 17:26:08,077 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 733 transitions. Word has length 21 [2021-07-09 17:26:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:08,077 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 733 transitions. [2021-07-09 17:26:08,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 733 transitions. [2021-07-09 17:26:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:26:08,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:08,084 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:08,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:26:08,301 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1684279670, now seen corresponding path program 3 times [2021-07-09 17:26:08,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:08,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103968279] [2021-07-09 17:26:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:08,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:08,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103968279] [2021-07-09 17:26:08,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103968279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546571445] [2021-07-09 17:26:08,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:08,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:26:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546571445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:08,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:26:08,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132029703] [2021-07-09 17:26:08,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:26:08,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:26:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:26:08,449 INFO L87 Difference]: Start difference. First operand 251 states and 733 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:08,531 INFO L93 Difference]: Finished difference Result 375 states and 1095 transitions. [2021-07-09 17:26:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:26:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:08,533 INFO L225 Difference]: With dead ends: 375 [2021-07-09 17:26:08,533 INFO L226 Difference]: Without dead ends: 282 [2021-07-09 17:26:08,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-09 17:26:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-07-09 17:26:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9359430604982206) internal successors, (825), 281 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 825 transitions. [2021-07-09 17:26:08,538 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 825 transitions. Word has length 22 [2021-07-09 17:26:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:08,538 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 825 transitions. [2021-07-09 17:26:08,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 825 transitions. [2021-07-09 17:26:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:26:08,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:08,539 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:08,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,753 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:08,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1842206699, now seen corresponding path program 4 times [2021-07-09 17:26:08,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:08,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981503379] [2021-07-09 17:26:08,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:08,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981503379] [2021-07-09 17:26:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981503379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50552651] [2021-07-09 17:26:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:08,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:26:08,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50552651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:08,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:26:08,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725836133] [2021-07-09 17:26:08,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:26:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:26:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:26:08,927 INFO L87 Difference]: Start difference. First operand 282 states and 825 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:09,047 INFO L93 Difference]: Finished difference Result 406 states and 1187 transitions. [2021-07-09 17:26:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:26:09,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:26:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:09,049 INFO L225 Difference]: With dead ends: 406 [2021-07-09 17:26:09,049 INFO L226 Difference]: Without dead ends: 313 [2021-07-09 17:26:09,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-09 17:26:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-07-09 17:26:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9391025641025643) internal successors, (917), 312 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 917 transitions. [2021-07-09 17:26:09,055 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 917 transitions. Word has length 23 [2021-07-09 17:26:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:09,055 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 917 transitions. [2021-07-09 17:26:09,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 917 transitions. [2021-07-09 17:26:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:09,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:09,056 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:09,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,269 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -505865558, now seen corresponding path program 5 times [2021-07-09 17:26:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:09,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309291644] [2021-07-09 17:26:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:09,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:09,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309291644] [2021-07-09 17:26:09,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309291644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531258273] [2021-07-09 17:26:09,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:09,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:09,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:09,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:09,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:09,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:09,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:09,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:09,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:26:09,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:09,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:09,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:09,745 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:09,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:09,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-07-09 17:26:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:09,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531258273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:09,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:09,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970805555] [2021-07-09 17:26:09,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:09,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:09,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:09,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:09,827 INFO L87 Difference]: Start difference. First operand 313 states and 917 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:10,188 INFO L93 Difference]: Finished difference Result 519 states and 1492 transitions. [2021-07-09 17:26:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:10,191 INFO L225 Difference]: With dead ends: 519 [2021-07-09 17:26:10,191 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:26:10,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:26:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 355. [2021-07-09 17:26:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.926553672316384) internal successors, (1036), 354 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1036 transitions. [2021-07-09 17:26:10,198 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1036 transitions. Word has length 24 [2021-07-09 17:26:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:10,198 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1036 transitions. [2021-07-09 17:26:10,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1036 transitions. [2021-07-09 17:26:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:10,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:10,199 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:10,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:26:10,419 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:10,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1479730454, now seen corresponding path program 6 times [2021-07-09 17:26:10,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:10,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471937673] [2021-07-09 17:26:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:10,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:10,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471937673] [2021-07-09 17:26:10,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471937673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035281094] [2021-07-09 17:26:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:10,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:10,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:10,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:10,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:10,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:10,761 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:26:10,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:10,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,896 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:10,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-07-09 17:26:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:10,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035281094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:10,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:10,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271530321] [2021-07-09 17:26:10,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:10,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:10,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:10,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:10,945 INFO L87 Difference]: Start difference. First operand 355 states and 1036 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:11,313 INFO L93 Difference]: Finished difference Result 540 states and 1555 transitions. [2021-07-09 17:26:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:11,318 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:26:11,318 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 17:26:11,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 17:26:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 362. [2021-07-09 17:26:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9473684210526314) internal successors, (1064), 361 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1064 transitions. [2021-07-09 17:26:11,334 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1064 transitions. Word has length 24 [2021-07-09 17:26:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:11,334 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1064 transitions. [2021-07-09 17:26:11,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1064 transitions. [2021-07-09 17:26:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:11,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:11,336 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:11,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,553 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1745148276, now seen corresponding path program 7 times [2021-07-09 17:26:11,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:11,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927282960] [2021-07-09 17:26:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:11,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:11,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927282960] [2021-07-09 17:26:11,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927282960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886771270] [2021-07-09 17:26:11,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:11,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:11,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:11,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:11,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:11,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:11,857 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:26:11,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:11,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:11,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:11,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:11,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:11,966 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:11,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:11,967 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-07-09 17:26:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:12,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886771270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:12,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:12,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915619940] [2021-07-09 17:26:12,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:12,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:12,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:12,083 INFO L87 Difference]: Start difference. First operand 362 states and 1064 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:12,642 INFO L93 Difference]: Finished difference Result 662 states and 1885 transitions. [2021-07-09 17:26:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:12,644 INFO L225 Difference]: With dead ends: 662 [2021-07-09 17:26:12,644 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 17:26:12,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 17:26:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 376. [2021-07-09 17:26:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.005333333333333) internal successors, (1127), 375 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1127 transitions. [2021-07-09 17:26:12,655 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1127 transitions. Word has length 24 [2021-07-09 17:26:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:12,655 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1127 transitions. [2021-07-09 17:26:12,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1127 transitions. [2021-07-09 17:26:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:12,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:12,656 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:12,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:26:12,865 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2106965424, now seen corresponding path program 8 times [2021-07-09 17:26:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863089183] [2021-07-09 17:26:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:13,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:13,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863089183] [2021-07-09 17:26:13,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863089183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447373922] [2021-07-09 17:26:13,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:13,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:13,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:13,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:13,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:13,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:13,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:13,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:13,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:26:13,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:13,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:13,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:13,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:13,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,299 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-07-09 17:26:13,299 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:13,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,300 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:15 [2021-07-09 17:26:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:13,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447373922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:13,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:26:13,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881021632] [2021-07-09 17:26:13,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:13,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:13,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:13,344 INFO L87 Difference]: Start difference. First operand 376 states and 1127 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:13,762 INFO L93 Difference]: Finished difference Result 500 states and 1479 transitions. [2021-07-09 17:26:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:13,764 INFO L225 Difference]: With dead ends: 500 [2021-07-09 17:26:13,764 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 17:26:13,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 17:26:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 390. [2021-07-09 17:26:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.005141388174807) internal successors, (1169), 389 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1169 transitions. [2021-07-09 17:26:13,773 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1169 transitions. Word has length 24 [2021-07-09 17:26:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:13,773 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1169 transitions. [2021-07-09 17:26:13,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1169 transitions. [2021-07-09 17:26:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:13,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:13,774 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:13,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:26:13,985 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:13,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1841547602, now seen corresponding path program 9 times [2021-07-09 17:26:13,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:13,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824809847] [2021-07-09 17:26:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:14,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:14,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824809847] [2021-07-09 17:26:14,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824809847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72016621] [2021-07-09 17:26:14,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:14,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:14,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:14,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:14,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:14,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:14,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:14,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:14,274 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:26:14,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:14,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:14,337 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:14,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:14,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:14,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2021-07-09 17:26:14,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:14,357 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:26:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:14,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72016621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:14,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:26:14,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710158023] [2021-07-09 17:26:14,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:14,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:14,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:14,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:14,439 INFO L87 Difference]: Start difference. First operand 390 states and 1169 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:14,924 INFO L93 Difference]: Finished difference Result 508 states and 1523 transitions. [2021-07-09 17:26:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:14,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:14,926 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:26:14,926 INFO L226 Difference]: Without dead ends: 462 [2021-07-09 17:26:14,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 451.7ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-09 17:26:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 397. [2021-07-09 17:26:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.022727272727273) internal successors, (1197), 396 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1197 transitions. [2021-07-09 17:26:14,934 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1197 transitions. Word has length 24 [2021-07-09 17:26:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:14,934 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1197 transitions. [2021-07-09 17:26:14,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1197 transitions. [2021-07-09 17:26:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:14,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:14,935 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:15,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:15,149 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash -307248934, now seen corresponding path program 10 times [2021-07-09 17:26:15,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:15,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027476367] [2021-07-09 17:26:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:15,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:15,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027476367] [2021-07-09 17:26:15,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027476367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417789895] [2021-07-09 17:26:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:15,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:15,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:15,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:15,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:15,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:15,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:15,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:26:15,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:15,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:15,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,589 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-07-09 17:26:15,589 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:15,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:15,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:15,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-07-09 17:26:15,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:15,613 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-07-09 17:26:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:15,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417789895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:15,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:26:15,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977134037] [2021-07-09 17:26:15,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:15,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:15,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:15,713 INFO L87 Difference]: Start difference. First operand 397 states and 1197 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:16,329 INFO L93 Difference]: Finished difference Result 667 states and 1964 transitions. [2021-07-09 17:26:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:16,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:16,332 INFO L225 Difference]: With dead ends: 667 [2021-07-09 17:26:16,332 INFO L226 Difference]: Without dead ends: 576 [2021-07-09 17:26:16,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-09 17:26:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 426. [2021-07-09 17:26:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.018823529411765) internal successors, (1283), 425 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1283 transitions. [2021-07-09 17:26:16,342 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1283 transitions. Word has length 24 [2021-07-09 17:26:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:16,342 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1283 transitions. [2021-07-09 17:26:16,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1283 transitions. [2021-07-09 17:26:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:16,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:16,343 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:16,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:26:16,557 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash 634923818, now seen corresponding path program 11 times [2021-07-09 17:26:16,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:16,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559588962] [2021-07-09 17:26:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:16,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:16,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559588962] [2021-07-09 17:26:16,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559588962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021582692] [2021-07-09 17:26:16,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:16,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:16,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:16,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:16,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:16,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:16,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:16,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:27 [2021-07-09 17:26:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:16,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:16,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:16,872 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:16,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:16,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-07-09 17:26:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021582692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:16,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:26:16,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741038144] [2021-07-09 17:26:16,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:16,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:16,947 INFO L87 Difference]: Start difference. First operand 426 states and 1283 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:17,257 INFO L93 Difference]: Finished difference Result 562 states and 1672 transitions. [2021-07-09 17:26:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:17,259 INFO L225 Difference]: With dead ends: 562 [2021-07-09 17:26:17,259 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:26:17,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:26:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 453. [2021-07-09 17:26:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.017699115044248) internal successors, (1364), 452 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1364 transitions. [2021-07-09 17:26:17,268 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1364 transitions. Word has length 24 [2021-07-09 17:26:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:17,268 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1364 transitions. [2021-07-09 17:26:17,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1364 transitions. [2021-07-09 17:26:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:17,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:17,269 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:17,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:26:17,485 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 369505996, now seen corresponding path program 12 times [2021-07-09 17:26:17,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:17,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898167659] [2021-07-09 17:26:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:17,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898167659] [2021-07-09 17:26:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898167659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500717117] [2021-07-09 17:26:17,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:17,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:17,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:17,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:17,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:17,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:26:17,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:17,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:17,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,906 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-07-09 17:26:17,907 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:17,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-07-09 17:26:17,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:17,931 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-07-09 17:26:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:18,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500717117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:18,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:26:18,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403248844] [2021-07-09 17:26:18,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:18,028 INFO L87 Difference]: Start difference. First operand 453 states and 1364 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:18,650 INFO L93 Difference]: Finished difference Result 729 states and 2118 transitions. [2021-07-09 17:26:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:18,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:18,652 INFO L225 Difference]: With dead ends: 729 [2021-07-09 17:26:18,652 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 17:26:18,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 17:26:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 474. [2021-07-09 17:26:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.076109936575053) internal successors, (1455), 473 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1455 transitions. [2021-07-09 17:26:18,661 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1455 transitions. Word has length 24 [2021-07-09 17:26:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:18,662 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1455 transitions. [2021-07-09 17:26:18,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1455 transitions. [2021-07-09 17:26:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:18,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:18,663 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:18,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:18,877 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1779290540, now seen corresponding path program 13 times [2021-07-09 17:26:18,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:18,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617751368] [2021-07-09 17:26:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:19,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:19,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617751368] [2021-07-09 17:26:19,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617751368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:19,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488745337] [2021-07-09 17:26:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:19,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:19,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:19,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:19,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:19,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:19,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:19,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:19,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:26:19,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:19,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:19,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:19,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:19,293 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-07-09 17:26:19,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:19,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:19,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:19,321 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:19,321 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-07-09 17:26:19,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:19,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-07-09 17:26:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:19,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488745337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:19,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:19,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:26:19,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829000059] [2021-07-09 17:26:19,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:19,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:19,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:19,415 INFO L87 Difference]: Start difference. First operand 474 states and 1455 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:20,054 INFO L93 Difference]: Finished difference Result 834 states and 2442 transitions. [2021-07-09 17:26:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:20,058 INFO L225 Difference]: With dead ends: 834 [2021-07-09 17:26:20,058 INFO L226 Difference]: Without dead ends: 712 [2021-07-09 17:26:20,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 613.1ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-07-09 17:26:20,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 495. [2021-07-09 17:26:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.1153846153846154) internal successors, (1539), 494 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1539 transitions. [2021-07-09 17:26:20,070 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1539 transitions. Word has length 24 [2021-07-09 17:26:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:20,070 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1539 transitions. [2021-07-09 17:26:20,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1539 transitions. [2021-07-09 17:26:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:20,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:20,071 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:20,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 17:26:20,285 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1272944274, now seen corresponding path program 14 times [2021-07-09 17:26:20,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:20,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524145141] [2021-07-09 17:26:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:20,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:20,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524145141] [2021-07-09 17:26:20,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524145141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128810140] [2021-07-09 17:26:20,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:20,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:20,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:20,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:20,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:20,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:20,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:20,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:20,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:26:20,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:20,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:20,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:20,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:20,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:20,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:20,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:20,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:20,697 INFO L628 ElimStorePlain]: treesize reduction 53, result has 43.0 percent of original size [2021-07-09 17:26:20,697 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:20,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:20,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:40 [2021-07-09 17:26:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:20,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128810140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:20,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:26:20,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177331232] [2021-07-09 17:26:20,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:20,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:20,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:20,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:20,780 INFO L87 Difference]: Start difference. First operand 495 states and 1539 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:21,575 INFO L93 Difference]: Finished difference Result 1038 states and 3038 transitions. [2021-07-09 17:26:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:21,578 INFO L225 Difference]: With dead ends: 1038 [2021-07-09 17:26:21,578 INFO L226 Difference]: Without dead ends: 870 [2021-07-09 17:26:21,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 781.0ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-07-09 17:26:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 556. [2021-07-09 17:26:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.126126126126126) internal successors, (1735), 555 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1735 transitions. [2021-07-09 17:26:21,589 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1735 transitions. Word has length 24 [2021-07-09 17:26:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:21,589 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1735 transitions. [2021-07-09 17:26:21,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1735 transitions. [2021-07-09 17:26:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:21,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:21,591 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:21,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:21,802 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:21,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2034365354, now seen corresponding path program 15 times [2021-07-09 17:26:21,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:21,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121820978] [2021-07-09 17:26:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:21,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:21,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121820978] [2021-07-09 17:26:21,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121820978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315799557] [2021-07-09 17:26:21,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:22,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:22,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:22,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:22,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:22,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-07-09 17:26:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:22,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:22,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:26:22,206 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:22,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:26:22,211 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:22,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:22,228 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-07-09 17:26:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:22,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315799557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:22,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:22,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:22,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149237089] [2021-07-09 17:26:22,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:22,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:22,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:22,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:22,283 INFO L87 Difference]: Start difference. First operand 556 states and 1735 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:23,683 INFO L93 Difference]: Finished difference Result 1218 states and 3567 transitions. [2021-07-09 17:26:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:26:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:23,687 INFO L225 Difference]: With dead ends: 1218 [2021-07-09 17:26:23,687 INFO L226 Difference]: Without dead ends: 1118 [2021-07-09 17:26:23,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1203.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:26:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-07-09 17:26:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 618. [2021-07-09 17:26:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.1053484602917343) internal successors, (1916), 617 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1916 transitions. [2021-07-09 17:26:23,700 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1916 transitions. Word has length 24 [2021-07-09 17:26:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:23,700 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1916 transitions. [2021-07-09 17:26:23,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1916 transitions. [2021-07-09 17:26:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:23,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:23,701 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:23,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 17:26:23,918 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -67894864, now seen corresponding path program 16 times [2021-07-09 17:26:23,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:23,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823411554] [2021-07-09 17:26:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:24,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:24,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823411554] [2021-07-09 17:26:24,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823411554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127559569] [2021-07-09 17:26:24,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:24,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:24,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:24,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:24,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:24,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:24,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:24,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:24,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:24,250 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:26:24,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:24,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:26:24,389 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:24,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:24,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:24,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:11 [2021-07-09 17:26:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:24,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127559569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:24,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:24,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122509000] [2021-07-09 17:26:24,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:24,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:24,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:24,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:24,442 INFO L87 Difference]: Start difference. First operand 618 states and 1916 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:25,168 INFO L93 Difference]: Finished difference Result 966 states and 2867 transitions. [2021-07-09 17:26:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:25,172 INFO L225 Difference]: With dead ends: 966 [2021-07-09 17:26:25,172 INFO L226 Difference]: Without dead ends: 908 [2021-07-09 17:26:25,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 803.3ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:26:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-07-09 17:26:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 628. [2021-07-09 17:26:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.0988835725677832) internal successors, (1943), 627 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1943 transitions. [2021-07-09 17:26:25,188 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1943 transitions. Word has length 24 [2021-07-09 17:26:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:25,188 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 1943 transitions. [2021-07-09 17:26:25,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1943 transitions. [2021-07-09 17:26:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:25,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:25,189 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:25,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,409 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1805866680, now seen corresponding path program 17 times [2021-07-09 17:26:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:25,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709764679] [2021-07-09 17:26:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:25,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:25,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709764679] [2021-07-09 17:26:25,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709764679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657230621] [2021-07-09 17:26:25,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:25,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:25,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:25,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:25,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:25,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:25,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:25,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:25,727 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:26:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:25,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:25,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:25,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:25,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,873 INFO L628 ElimStorePlain]: treesize reduction 42, result has 60.0 percent of original size [2021-07-09 17:26:25,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:26:25,877 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:25,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:25,882 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:25,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:25,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:26:25,904 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:133, output treesize:47 [2021-07-09 17:26:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:25,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657230621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:25,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:25,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126818430] [2021-07-09 17:26:25,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:25,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:25,983 INFO L87 Difference]: Start difference. First operand 628 states and 1943 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:27,115 INFO L93 Difference]: Finished difference Result 1056 states and 3059 transitions. [2021-07-09 17:26:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:27,119 INFO L225 Difference]: With dead ends: 1056 [2021-07-09 17:26:27,119 INFO L226 Difference]: Without dead ends: 968 [2021-07-09 17:26:27,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1172.3ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:26:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-07-09 17:26:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 624. [2021-07-09 17:26:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.102728731942215) internal successors, (1933), 623 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1933 transitions. [2021-07-09 17:26:27,130 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1933 transitions. Word has length 24 [2021-07-09 17:26:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:27,130 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1933 transitions. [2021-07-09 17:26:27,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1933 transitions. [2021-07-09 17:26:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:27,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:27,131 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:27,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 17:26:27,348 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1419323502, now seen corresponding path program 18 times [2021-07-09 17:26:27,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:27,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188031290] [2021-07-09 17:26:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:27,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:27,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188031290] [2021-07-09 17:26:27,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188031290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:27,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301610650] [2021-07-09 17:26:27,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:27,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:27,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:27,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:27,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:27,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:27,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:27,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:27,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:27,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:27,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:27,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:26:27,723 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-09 17:26:27,936 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:26:27,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:27,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:27,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:27,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:27,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:27,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:27,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:27,964 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:27,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:27,968 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:27,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:27,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:27,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-07-09 17:26:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:28,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301610650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:28,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:28,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:28,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158227872] [2021-07-09 17:26:28,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:28,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:28,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:28,043 INFO L87 Difference]: Start difference. First operand 624 states and 1933 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:29,394 INFO L93 Difference]: Finished difference Result 1071 states and 3184 transitions. [2021-07-09 17:26:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:29,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:29,398 INFO L225 Difference]: With dead ends: 1071 [2021-07-09 17:26:29,398 INFO L226 Difference]: Without dead ends: 985 [2021-07-09 17:26:29,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1247.2ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:26:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-09 17:26:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 649. [2021-07-09 17:26:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.0972222222222223) internal successors, (2007), 648 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2007 transitions. [2021-07-09 17:26:29,417 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2007 transitions. Word has length 24 [2021-07-09 17:26:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:29,417 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2007 transitions. [2021-07-09 17:26:29,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2007 transitions. [2021-07-09 17:26:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:29,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:29,423 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:29,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:29,637 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1137671978, now seen corresponding path program 19 times [2021-07-09 17:26:29,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:29,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48849978] [2021-07-09 17:26:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:29,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:29,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48849978] [2021-07-09 17:26:29,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48849978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685811656] [2021-07-09 17:26:29,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:29,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:29,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:29,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:29,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:29,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:29,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:29,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:29,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:30,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:30,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:30,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:26:30,312 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_18], 1=[o_0, v_prenex_17]} [2021-07-09 17:26:30,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:30,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:30,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:30,357 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:30,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:30,379 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:30,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:30,399 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-07-09 17:26:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:30,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685811656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:30,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:30,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332270781] [2021-07-09 17:26:30,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:30,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:30,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:30,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:30,498 INFO L87 Difference]: Start difference. First operand 649 states and 2007 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,906 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 17:26:31,255 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-09 17:26:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:31,937 INFO L93 Difference]: Finished difference Result 1160 states and 3432 transitions. [2021-07-09 17:26:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:26:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:31,941 INFO L225 Difference]: With dead ends: 1160 [2021-07-09 17:26:31,941 INFO L226 Difference]: Without dead ends: 1094 [2021-07-09 17:26:31,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1494.7ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:26:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-07-09 17:26:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 662. [2021-07-09 17:26:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.104387291981846) internal successors, (2052), 661 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2052 transitions. [2021-07-09 17:26:31,953 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2052 transitions. Word has length 24 [2021-07-09 17:26:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:31,953 INFO L482 AbstractCegarLoop]: Abstraction has 662 states and 2052 transitions. [2021-07-09 17:26:31,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2052 transitions. [2021-07-09 17:26:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:31,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:31,955 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:32,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 17:26:32,177 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:32,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1957932178, now seen corresponding path program 20 times [2021-07-09 17:26:32,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:32,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287028603] [2021-07-09 17:26:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:32,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:32,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287028603] [2021-07-09 17:26:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287028603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400562558] [2021-07-09 17:26:32,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:32,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:32,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:32,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:32,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:32,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:32,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:32,655 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:26:32,849 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_25, v_prenex_29, v_prenex_27], 1=[o_0, v_prenex_24, v_prenex_28, v_prenex_26]} [2021-07-09 17:26:32,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:32,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:32,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:32,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:33,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:33,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:33,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:33,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:33,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:33,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:33,076 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:33,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:33,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:33,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:33,126 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:33,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:33,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:33,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:33,181 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:33,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:33,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:33,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:33,236 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:33,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:33,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:33,291 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-07-09 17:26:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:33,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400562558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:33,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:33,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:33,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218070965] [2021-07-09 17:26:33,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:33,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:33,441 INFO L87 Difference]: Start difference. First operand 662 states and 2052 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,006 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-07-09 17:26:34,492 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2021-07-09 17:26:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:35,137 INFO L93 Difference]: Finished difference Result 1216 states and 3581 transitions. [2021-07-09 17:26:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:26:35,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:35,140 INFO L225 Difference]: With dead ends: 1216 [2021-07-09 17:26:35,141 INFO L226 Difference]: Without dead ends: 1142 [2021-07-09 17:26:35,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1760.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:26:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-09 17:26:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 672. [2021-07-09 17:26:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.1147540983606556) internal successors, (2090), 671 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2090 transitions. [2021-07-09 17:26:35,153 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2090 transitions. Word has length 24 [2021-07-09 17:26:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:35,153 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2090 transitions. [2021-07-09 17:26:35,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2090 transitions. [2021-07-09 17:26:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:35,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:35,154 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:35,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 17:26:35,361 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash -471725510, now seen corresponding path program 21 times [2021-07-09 17:26:35,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:35,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669817481] [2021-07-09 17:26:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:35,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:35,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669817481] [2021-07-09 17:26:35,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669817481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281427393] [2021-07-09 17:26:35,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:35,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:35,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:35,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:35,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:35,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:22 [2021-07-09 17:26:35,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:35,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:35,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,702 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:35,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:35,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-07-09 17:26:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:35,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281427393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:35,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:26:35,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992759024] [2021-07-09 17:26:35,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:26:35,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:26:35,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:35,776 INFO L87 Difference]: Start difference. First operand 672 states and 2090 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:36,328 INFO L93 Difference]: Finished difference Result 1082 states and 3287 transitions. [2021-07-09 17:26:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:36,330 INFO L225 Difference]: With dead ends: 1082 [2021-07-09 17:26:36,330 INFO L226 Difference]: Without dead ends: 957 [2021-07-09 17:26:36,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-07-09 17:26:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 674. [2021-07-09 17:26:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.087667161961367) internal successors, (2078), 673 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2078 transitions. [2021-07-09 17:26:36,341 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2078 transitions. Word has length 24 [2021-07-09 17:26:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:36,341 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2078 transitions. [2021-07-09 17:26:36,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2078 transitions. [2021-07-09 17:26:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:36,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:36,343 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:36,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 17:26:36,557 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash 155060784, now seen corresponding path program 22 times [2021-07-09 17:26:36,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:36,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938045439] [2021-07-09 17:26:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:36,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:36,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938045439] [2021-07-09 17:26:36,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938045439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284588760] [2021-07-09 17:26:36,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:36,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:36,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:36,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:36,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:36,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:36,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:36,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:36,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:36,784 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:26:36,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:36,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:36,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:36,856 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:36,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:36,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-07-09 17:26:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:36,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284588760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:36,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:36,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780954551] [2021-07-09 17:26:36,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:36,900 INFO L87 Difference]: Start difference. First operand 674 states and 2078 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:37,317 INFO L93 Difference]: Finished difference Result 892 states and 2742 transitions. [2021-07-09 17:26:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:37,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:37,319 INFO L225 Difference]: With dead ends: 892 [2021-07-09 17:26:37,319 INFO L226 Difference]: Without dead ends: 861 [2021-07-09 17:26:37,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-07-09 17:26:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 688. [2021-07-09 17:26:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.096069868995633) internal successors, (2127), 687 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2127 transitions. [2021-07-09 17:26:37,330 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2127 transitions. Word has length 24 [2021-07-09 17:26:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:37,330 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2127 transitions. [2021-07-09 17:26:37,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2127 transitions. [2021-07-09 17:26:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:37,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:37,331 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:37,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:37,541 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:37,542 INFO L82 PathProgramCache]: Analyzing trace with hash -110357038, now seen corresponding path program 23 times [2021-07-09 17:26:37,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:37,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474914296] [2021-07-09 17:26:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:37,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:37,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474914296] [2021-07-09 17:26:37,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474914296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137958095] [2021-07-09 17:26:37,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:37,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:37,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:37,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:37,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:37,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:37,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:37,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:37,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:37,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:37,850 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:26:37,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:37,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:37,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:37,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:37,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:37,937 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:37,937 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-07-09 17:26:37,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:37,938 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:26:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:38,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137958095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:38,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:38,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794681477] [2021-07-09 17:26:38,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:38,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:38,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:38,020 INFO L87 Difference]: Start difference. First operand 688 states and 2127 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:38,572 INFO L93 Difference]: Finished difference Result 1018 states and 3050 transitions. [2021-07-09 17:26:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:38,575 INFO L225 Difference]: With dead ends: 1018 [2021-07-09 17:26:38,575 INFO L226 Difference]: Without dead ends: 941 [2021-07-09 17:26:38,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 547.7ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-07-09 17:26:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 693. [2021-07-09 17:26:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.0852601156069364) internal successors, (2135), 692 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2135 transitions. [2021-07-09 17:26:38,586 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2135 transitions. Word has length 24 [2021-07-09 17:26:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:38,586 INFO L482 AbstractCegarLoop]: Abstraction has 693 states and 2135 transitions. [2021-07-09 17:26:38,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2135 transitions. [2021-07-09 17:26:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:38,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:38,587 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:38,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 17:26:38,800 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2035813722, now seen corresponding path program 24 times [2021-07-09 17:26:38,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:38,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088747168] [2021-07-09 17:26:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:38,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:38,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088747168] [2021-07-09 17:26:38,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088747168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794172012] [2021-07-09 17:26:38,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:38,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:26:38,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:39,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:39,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:39,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:39,081 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:26:39,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:39,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:39,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,170 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:39,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-07-09 17:26:39,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:39,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:26:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:39,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794172012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:39,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 17:26:39,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983748875] [2021-07-09 17:26:39,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:26:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:26:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:39,282 INFO L87 Difference]: Start difference. First operand 693 states and 2135 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:39,888 INFO L93 Difference]: Finished difference Result 1025 states and 3120 transitions. [2021-07-09 17:26:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:39,891 INFO L225 Difference]: With dead ends: 1025 [2021-07-09 17:26:39,891 INFO L226 Difference]: Without dead ends: 949 [2021-07-09 17:26:39,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-07-09 17:26:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 719. [2021-07-09 17:26:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.1100278551532035) internal successors, (2233), 718 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2233 transitions. [2021-07-09 17:26:39,903 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2233 transitions. Word has length 24 [2021-07-09 17:26:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:39,903 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2233 transitions. [2021-07-09 17:26:39,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2233 transitions. [2021-07-09 17:26:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:39,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:39,905 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:40,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,122 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1742652156, now seen corresponding path program 25 times [2021-07-09 17:26:40,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:40,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360953606] [2021-07-09 17:26:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:40,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:40,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360953606] [2021-07-09 17:26:40,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360953606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60941495] [2021-07-09 17:26:40,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:40,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:40,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:40,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:40,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:40,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:40,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:40,594 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:40,803 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:26:40,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:40,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:40,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,833 INFO L628 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2021-07-09 17:26:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:26:40,837 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:40,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:40,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-07-09 17:26:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60941495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:40,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:40,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792236369] [2021-07-09 17:26:40,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:40,886 INFO L87 Difference]: Start difference. First operand 719 states and 2233 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:41,686 INFO L93 Difference]: Finished difference Result 939 states and 2804 transitions. [2021-07-09 17:26:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:41,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:41,688 INFO L225 Difference]: With dead ends: 939 [2021-07-09 17:26:41,688 INFO L226 Difference]: Without dead ends: 853 [2021-07-09 17:26:41,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 825.5ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:26:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-07-09 17:26:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 737. [2021-07-09 17:26:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.114130434782609) internal successors, (2292), 736 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2292 transitions. [2021-07-09 17:26:41,699 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2292 transitions. Word has length 24 [2021-07-09 17:26:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:41,699 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2292 transitions. [2021-07-09 17:26:41,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2292 transitions. [2021-07-09 17:26:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:41,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:41,700 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:41,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:26:41,909 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:41,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:41,910 INFO L82 PathProgramCache]: Analyzing trace with hash 4680340, now seen corresponding path program 26 times [2021-07-09 17:26:41,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:41,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206470374] [2021-07-09 17:26:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:42,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:42,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206470374] [2021-07-09 17:26:42,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206470374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131058809] [2021-07-09 17:26:42,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:42,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:42,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:42,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:42,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:42,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:42,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:42,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:42,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:42,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:42,591 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_45], 1=[o_0, v_prenex_44]} [2021-07-09 17:26:42,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:42,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:42,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,680 INFO L628 ElimStorePlain]: treesize reduction 47, result has 67.6 percent of original size [2021-07-09 17:26:42,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:42,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:26:42,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:42,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:42,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:42,726 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:42,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:42,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:42,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:42,762 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:42,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:42,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:26:42,793 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-07-09 17:26:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:42,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131058809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:42,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:26:42,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822551547] [2021-07-09 17:26:42,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:26:42,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:26:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:42,870 INFO L87 Difference]: Start difference. First operand 737 states and 2292 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:43,524 INFO L93 Difference]: Finished difference Result 968 states and 2868 transitions. [2021-07-09 17:26:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:43,526 INFO L225 Difference]: With dead ends: 968 [2021-07-09 17:26:43,526 INFO L226 Difference]: Without dead ends: 880 [2021-07-09 17:26:43,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 749.0ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-07-09 17:26:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 739. [2021-07-09 17:26:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.1124661246612466) internal successors, (2297), 738 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2297 transitions. [2021-07-09 17:26:43,537 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2297 transitions. Word has length 24 [2021-07-09 17:26:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:43,537 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2297 transitions. [2021-07-09 17:26:43,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2297 transitions. [2021-07-09 17:26:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:43,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:43,538 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:43,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:26:43,741 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash 223976316, now seen corresponding path program 27 times [2021-07-09 17:26:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:43,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350723765] [2021-07-09 17:26:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:43,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:43,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350723765] [2021-07-09 17:26:43,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350723765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679408839] [2021-07-09 17:26:43,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:43,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:26:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:43,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:43,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:43,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:43,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:43,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:43,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:43,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:43,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:44,014 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-07-09 17:26:44,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:44,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:44,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,151 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-07-09 17:26:44,151 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:44,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-07-09 17:26:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:26:44,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679408839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:44,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:44,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:44,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650880790] [2021-07-09 17:26:44,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:44,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:44,178 INFO L87 Difference]: Start difference. First operand 739 states and 2297 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:44,659 INFO L93 Difference]: Finished difference Result 952 states and 2894 transitions. [2021-07-09 17:26:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:44,661 INFO L225 Difference]: With dead ends: 952 [2021-07-09 17:26:44,661 INFO L226 Difference]: Without dead ends: 869 [2021-07-09 17:26:44,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-07-09 17:26:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 750. [2021-07-09 17:26:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.1174899866488652) internal successors, (2335), 749 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2335 transitions. [2021-07-09 17:26:44,671 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2335 transitions. Word has length 24 [2021-07-09 17:26:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:44,671 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2335 transitions. [2021-07-09 17:26:44,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2335 transitions. [2021-07-09 17:26:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:44,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:44,672 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:44,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:44,876 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1809660164, now seen corresponding path program 28 times [2021-07-09 17:26:44,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:44,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678278236] [2021-07-09 17:26:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:45,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678278236] [2021-07-09 17:26:45,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678278236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7051530] [2021-07-09 17:26:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:45,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:45,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:45,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:45,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:45,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:45,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:45,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:45,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:45,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:45,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:45,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:45,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:45,531 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_52], 1=[o_0, v_prenex_51]} [2021-07-09 17:26:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:45,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:45,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:45,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:45,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:45,587 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:45,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:45,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:45,614 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:45,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:45,638 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-07-09 17:26:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7051530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:45,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:45,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:45,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667202144] [2021-07-09 17:26:45,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:45,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:45,698 INFO L87 Difference]: Start difference. First operand 750 states and 2335 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:46,328 INFO L93 Difference]: Finished difference Result 1003 states and 3068 transitions. [2021-07-09 17:26:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:46,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:46,331 INFO L225 Difference]: With dead ends: 1003 [2021-07-09 17:26:46,331 INFO L226 Difference]: Without dead ends: 945 [2021-07-09 17:26:46,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-09 17:26:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 750. [2021-07-09 17:26:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.1174899866488652) internal successors, (2335), 749 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2335 transitions. [2021-07-09 17:26:46,342 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2335 transitions. Word has length 24 [2021-07-09 17:26:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:46,343 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2335 transitions. [2021-07-09 17:26:46,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2335 transitions. [2021-07-09 17:26:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:46,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:46,344 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:46,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 17:26:46,551 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1983552334, now seen corresponding path program 29 times [2021-07-09 17:26:46,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:46,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481993679] [2021-07-09 17:26:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:46,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:46,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481993679] [2021-07-09 17:26:46,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481993679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:46,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639061498] [2021-07-09 17:26:46,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:46,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:46,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:46,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:46,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:46,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:46,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:46,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:46,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:46,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:47,052 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:47,148 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_61, o_4, v_prenex_63, v_prenex_59], 1=[v_prenex_60, o_0, v_prenex_62, v_prenex_58]} [2021-07-09 17:26:47,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:47,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:47,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:47,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:47,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:47,369 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:47,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:47,418 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:47,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:47,467 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:47,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:47,520 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:47,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:47,563 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-07-09 17:26:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:47,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639061498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:47,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:47,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:47,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088622054] [2021-07-09 17:26:47,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:47,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:47,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:47,684 INFO L87 Difference]: Start difference. First operand 750 states and 2335 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:48,623 INFO L93 Difference]: Finished difference Result 1153 states and 3430 transitions. [2021-07-09 17:26:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:48,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:48,626 INFO L225 Difference]: With dead ends: 1153 [2021-07-09 17:26:48,626 INFO L226 Difference]: Without dead ends: 1087 [2021-07-09 17:26:48,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1031.3ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-07-09 17:26:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 768. [2021-07-09 17:26:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.139504563233377) internal successors, (2408), 767 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2408 transitions. [2021-07-09 17:26:48,639 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2408 transitions. Word has length 24 [2021-07-09 17:26:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:48,639 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2408 transitions. [2021-07-09 17:26:48,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2408 transitions. [2021-07-09 17:26:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:48,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:48,640 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:48,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:48,857 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash -174166668, now seen corresponding path program 30 times [2021-07-09 17:26:48,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:48,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109100387] [2021-07-09 17:26:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:49,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:49,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109100387] [2021-07-09 17:26:49,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109100387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:49,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248942578] [2021-07-09 17:26:49,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:49,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:49,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:49,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:49,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:49,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:49,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:49,366 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:49,473 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_72, v_prenex_70, o_4, v_prenex_74], 1=[o_0, v_prenex_71, v_prenex_73, v_prenex_69]} [2021-07-09 17:26:49,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:49,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:49,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:49,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:49,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:49,691 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:49,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:49,739 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:49,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:49,785 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:49,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:49,831 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:49,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:49,874 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-07-09 17:26:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:50,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248942578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:50,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:50,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:50,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7448078] [2021-07-09 17:26:50,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:50,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:50,002 INFO L87 Difference]: Start difference. First operand 768 states and 2408 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:50,742 INFO L93 Difference]: Finished difference Result 1210 states and 3633 transitions. [2021-07-09 17:26:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:50,745 INFO L225 Difference]: With dead ends: 1210 [2021-07-09 17:26:50,745 INFO L226 Difference]: Without dead ends: 1152 [2021-07-09 17:26:50,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 860.7ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:26:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-07-09 17:26:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 770. [2021-07-09 17:26:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.152145643693108) internal successors, (2424), 769 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2424 transitions. [2021-07-09 17:26:50,759 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2424 transitions. Word has length 24 [2021-07-09 17:26:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:50,759 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2424 transitions. [2021-07-09 17:26:50,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2424 transitions. [2021-07-09 17:26:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:50,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:50,760 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:50,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:50,977 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1577360876, now seen corresponding path program 31 times [2021-07-09 17:26:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:50,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801317036] [2021-07-09 17:26:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:51,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:51,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801317036] [2021-07-09 17:26:51,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801317036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:51,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112306600] [2021-07-09 17:26:51,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:51,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:51,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:51,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:26:51,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:51,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:51,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:51,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:26:51,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:51,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:51,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:51,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:51,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:51,373 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:26:51,373 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-07-09 17:26:51,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:51,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:26:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112306600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:51,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:51,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:26:51,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698767550] [2021-07-09 17:26:51,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:51,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:51,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:51,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:51,446 INFO L87 Difference]: Start difference. First operand 770 states and 2424 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:51,898 INFO L93 Difference]: Finished difference Result 1119 states and 3404 transitions. [2021-07-09 17:26:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:51,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:51,901 INFO L225 Difference]: With dead ends: 1119 [2021-07-09 17:26:51,901 INFO L226 Difference]: Without dead ends: 1025 [2021-07-09 17:26:51,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-09 17:26:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 763. [2021-07-09 17:26:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.1338582677165356) internal successors, (2388), 762 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2388 transitions. [2021-07-09 17:26:51,932 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2388 transitions. Word has length 24 [2021-07-09 17:26:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:51,933 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2388 transitions. [2021-07-09 17:26:51,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2388 transitions. [2021-07-09 17:26:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:51,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:51,934 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:52,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:52,149 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1480197740, now seen corresponding path program 32 times [2021-07-09 17:26:52,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:52,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204039348] [2021-07-09 17:26:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:52,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:52,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204039348] [2021-07-09 17:26:52,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204039348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:52,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555959] [2021-07-09 17:26:52,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:52,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:52,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:52,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:52,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:26:52,573 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:26:52,637 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_81, o_4], 1=[o_2, v_prenex_80]} [2021-07-09 17:26:52,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:52,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:52,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:52,690 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:52,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:52,714 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:52,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:52,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-07-09 17:26:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:52,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:52,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:52,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:52,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372898091] [2021-07-09 17:26:52,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:52,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:52,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:52,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:52,826 INFO L87 Difference]: Start difference. First operand 763 states and 2388 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:53,216 INFO L93 Difference]: Finished difference Result 1015 states and 3113 transitions. [2021-07-09 17:26:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:53,218 INFO L225 Difference]: With dead ends: 1015 [2021-07-09 17:26:53,218 INFO L226 Difference]: Without dead ends: 953 [2021-07-09 17:26:53,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-09 17:26:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 770. [2021-07-09 17:26:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.141742522756827) internal successors, (2416), 769 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2416 transitions. [2021-07-09 17:26:53,230 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2416 transitions. Word has length 24 [2021-07-09 17:26:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:53,230 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2416 transitions. [2021-07-09 17:26:53,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2416 transitions. [2021-07-09 17:26:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:53,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:53,232 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:53,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-07-09 17:26:53,445 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -848993238, now seen corresponding path program 33 times [2021-07-09 17:26:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:53,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763697395] [2021-07-09 17:26:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:53,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:53,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763697395] [2021-07-09 17:26:53,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763697395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:53,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998227549] [2021-07-09 17:26:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:53,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:53,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:53,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:53,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:53,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:53,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:53,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:53,919 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:54,018 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_92, o_4, v_prenex_88, v_prenex_90], 1=[v_prenex_91, o_2, v_prenex_87, v_prenex_89]} [2021-07-09 17:26:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:54,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:54,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:54,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:54,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:54,226 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:54,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:54,275 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:54,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:26:54,323 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:54,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:54,369 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:54,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:54,411 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-07-09 17:26:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:54,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998227549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:54,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:54,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:54,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863312376] [2021-07-09 17:26:54,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:54,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:54,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:54,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:54,569 INFO L87 Difference]: Start difference. First operand 770 states and 2416 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:54,829 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-07-09 17:26:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:55,400 INFO L93 Difference]: Finished difference Result 1231 states and 3714 transitions. [2021-07-09 17:26:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:55,403 INFO L225 Difference]: With dead ends: 1231 [2021-07-09 17:26:55,403 INFO L226 Difference]: Without dead ends: 1138 [2021-07-09 17:26:55,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 929.3ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:26:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-07-09 17:26:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 781. [2021-07-09 17:26:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.1576923076923076) internal successors, (2463), 780 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2463 transitions. [2021-07-09 17:26:55,415 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2463 transitions. Word has length 24 [2021-07-09 17:26:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:55,416 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2463 transitions. [2021-07-09 17:26:55,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2463 transitions. [2021-07-09 17:26:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:55,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:55,417 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:55,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:55,622 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:55,622 INFO L82 PathProgramCache]: Analyzing trace with hash -74788868, now seen corresponding path program 34 times [2021-07-09 17:26:55,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:55,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894649978] [2021-07-09 17:26:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:55,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:55,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894649978] [2021-07-09 17:26:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894649978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:55,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695730445] [2021-07-09 17:26:55,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:55,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:55,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:55,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:55,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:55,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:55,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:55,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:55,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:55,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:56,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:56,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:56,119 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:56,264 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_99], 1=[o_2, v_prenex_98]} [2021-07-09 17:26:56,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:56,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:56,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,347 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-07-09 17:26:56,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:56,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:56,381 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:56,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:56,410 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:56,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:26:56,440 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-07-09 17:26:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:56,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695730445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:56,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:56,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752563155] [2021-07-09 17:26:56,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:56,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:56,524 INFO L87 Difference]: Start difference. First operand 781 states and 2463 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:56,842 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-07-09 17:26:57,607 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-07-09 17:26:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:57,732 INFO L93 Difference]: Finished difference Result 1281 states and 3835 transitions. [2021-07-09 17:26:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:57,735 INFO L225 Difference]: With dead ends: 1281 [2021-07-09 17:26:57,735 INFO L226 Difference]: Without dead ends: 1134 [2021-07-09 17:26:57,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1096.8ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-07-09 17:26:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 773. [2021-07-09 17:26:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.1411917098445596) internal successors, (2425), 772 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2425 transitions. [2021-07-09 17:26:57,748 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2425 transitions. Word has length 24 [2021-07-09 17:26:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:57,748 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2425 transitions. [2021-07-09 17:26:57,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2425 transitions. [2021-07-09 17:26:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:57,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:57,749 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:57,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-07-09 17:26:57,965 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1132250228, now seen corresponding path program 35 times [2021-07-09 17:26:57,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:57,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525464841] [2021-07-09 17:26:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:58,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525464841] [2021-07-09 17:26:58,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525464841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508386497] [2021-07-09 17:26:58,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:58,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:58,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:58,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:58,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:58,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:58,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:58,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:26:58,599 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:26:58,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:58,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:26:58,611 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:26:58,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-07-09 17:26:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:58,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508386497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:58,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:26:58,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817685867] [2021-07-09 17:26:58,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:26:58,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:58,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:26:58,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:58,654 INFO L87 Difference]: Start difference. First operand 773 states and 2425 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:59,398 INFO L93 Difference]: Finished difference Result 962 states and 2930 transitions. [2021-07-09 17:26:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:26:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:59,400 INFO L225 Difference]: With dead ends: 962 [2021-07-09 17:26:59,400 INFO L226 Difference]: Without dead ends: 904 [2021-07-09 17:26:59,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:26:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-09 17:26:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 803. [2021-07-09 17:26:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.1433915211970076) internal successors, (2521), 802 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2521 transitions. [2021-07-09 17:26:59,412 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2521 transitions. Word has length 24 [2021-07-09 17:26:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:59,412 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2521 transitions. [2021-07-09 17:26:59,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2521 transitions. [2021-07-09 17:26:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:26:59,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:59,414 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:59,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-09 17:26:59,630 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash -605721588, now seen corresponding path program 36 times [2021-07-09 17:26:59,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:59,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160388834] [2021-07-09 17:26:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:26:59,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160388834] [2021-07-09 17:26:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160388834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397850678] [2021-07-09 17:26:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:59,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:59,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:59,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:59,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:59,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:00,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:00,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:00,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:00,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:00,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:00,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:00,028 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:27:00,137 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_109, o_4], 1=[v_prenex_108, o_0]} [2021-07-09 17:27:00,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:00,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:00,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:00,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:00,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:00,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:00,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:00,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:00,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:00,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:00,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:00,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:00,244 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:00,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:00,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:00,248 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:00,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:00,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:00,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:00,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:00,293 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:00,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:00,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:00,297 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:00,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:00,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:00,337 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-07-09 17:27:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:00,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397850678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:00,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:00,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:00,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536359532] [2021-07-09 17:27:00,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:00,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:00,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:00,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:00,430 INFO L87 Difference]: Start difference. First operand 803 states and 2521 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:01,373 INFO L93 Difference]: Finished difference Result 1054 states and 3176 transitions. [2021-07-09 17:27:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:27:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:01,375 INFO L225 Difference]: With dead ends: 1054 [2021-07-09 17:27:01,376 INFO L226 Difference]: Without dead ends: 966 [2021-07-09 17:27:01,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 834.2ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:27:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-07-09 17:27:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 801. [2021-07-09 17:27:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.1475) internal successors, (2518), 800 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2518 transitions. [2021-07-09 17:27:01,386 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2518 transitions. Word has length 24 [2021-07-09 17:27:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:01,386 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2518 transitions. [2021-07-09 17:27:01,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2518 transitions. [2021-07-09 17:27:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:01,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:01,388 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:01,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:01,588 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:01,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash -386425612, now seen corresponding path program 37 times [2021-07-09 17:27:01,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:01,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757092352] [2021-07-09 17:27:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:01,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:01,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757092352] [2021-07-09 17:27:01,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757092352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:01,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40928433] [2021-07-09 17:27:01,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:01,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:01,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:01,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:01,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:01,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:01,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:02,009 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:27:02,202 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:02,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:02,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:02,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,229 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:27:02,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:02,232 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:02,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-07-09 17:27:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:02,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40928433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:02,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:02,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730283410] [2021-07-09 17:27:02,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:02,275 INFO L87 Difference]: Start difference. First operand 801 states and 2518 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:02,546 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-07-09 17:27:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:02,987 INFO L93 Difference]: Finished difference Result 988 states and 2997 transitions. [2021-07-09 17:27:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:27:02,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:02,990 INFO L225 Difference]: With dead ends: 988 [2021-07-09 17:27:02,990 INFO L226 Difference]: Without dead ends: 903 [2021-07-09 17:27:02,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 725.5ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:27:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-07-09 17:27:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 808. [2021-07-09 17:27:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.1462205700123915) internal successors, (2539), 807 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2539 transitions. [2021-07-09 17:27:03,001 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2539 transitions. Word has length 24 [2021-07-09 17:27:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:03,001 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2539 transitions. [2021-07-09 17:27:03,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2539 transitions. [2021-07-09 17:27:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:03,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:03,002 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:03,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-09 17:27:03,221 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1874905204, now seen corresponding path program 38 times [2021-07-09 17:27:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:03,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647683299] [2021-07-09 17:27:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:03,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:03,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647683299] [2021-07-09 17:27:03,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647683299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:03,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929608395] [2021-07-09 17:27:03,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:03,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:03,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:03,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:03,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:03,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:03,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:03,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:03,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:03,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:03,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:03,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:03,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:03,608 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:27:03,688 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:03,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:03,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:03,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:03,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:03,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:03,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:03,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:03,721 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:03,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:03,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:03,725 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:03,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:03,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:03,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:31 [2021-07-09 17:27:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:03,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929608395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:03,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:03,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:03,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422172844] [2021-07-09 17:27:03,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:03,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:03,838 INFO L87 Difference]: Start difference. First operand 808 states and 2539 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:04,825 INFO L93 Difference]: Finished difference Result 1228 states and 3679 transitions. [2021-07-09 17:27:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:27:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:04,834 INFO L225 Difference]: With dead ends: 1228 [2021-07-09 17:27:04,834 INFO L226 Difference]: Without dead ends: 1121 [2021-07-09 17:27:04,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 871.8ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:27:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-07-09 17:27:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 815. [2021-07-09 17:27:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.1535626535626538) internal successors, (2567), 814 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2567 transitions. [2021-07-09 17:27:04,846 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2567 transitions. Word has length 24 [2021-07-09 17:27:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:04,846 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2567 transitions. [2021-07-09 17:27:04,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2567 transitions. [2021-07-09 17:27:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:04,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:04,848 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:05,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-09 17:27:05,048 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1701013034, now seen corresponding path program 39 times [2021-07-09 17:27:05,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:05,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003176525] [2021-07-09 17:27:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:05,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003176525] [2021-07-09 17:27:05,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003176525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385254832] [2021-07-09 17:27:05,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:05,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:05,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:05,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:05,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:05,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:05,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-07-09 17:27:05,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:05,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:05,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:05,390 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:05,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:05,394 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:05,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:05,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:05,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:05,475 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:05,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:05,479 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:05,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:05,509 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:129, output treesize:69 [2021-07-09 17:27:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385254832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:05,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:05,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139464764] [2021-07-09 17:27:05,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:05,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:05,675 INFO L87 Difference]: Start difference. First operand 815 states and 2567 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,081 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-09 17:27:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:06,629 INFO L93 Difference]: Finished difference Result 1152 states and 3472 transitions. [2021-07-09 17:27:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:27:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:06,631 INFO L225 Difference]: With dead ends: 1152 [2021-07-09 17:27:06,631 INFO L226 Difference]: Without dead ends: 1064 [2021-07-09 17:27:06,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 881.9ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-09 17:27:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 830. [2021-07-09 17:27:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.162846803377563) internal successors, (2622), 829 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2622 transitions. [2021-07-09 17:27:06,643 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2622 transitions. Word has length 24 [2021-07-09 17:27:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:06,643 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2622 transitions. [2021-07-09 17:27:06,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2622 transitions. [2021-07-09 17:27:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:06,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:06,645 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:06,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-09 17:27:06,845 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 820739498, now seen corresponding path program 40 times [2021-07-09 17:27:06,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:06,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751187480] [2021-07-09 17:27:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:07,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:07,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751187480] [2021-07-09 17:27:07,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751187480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:07,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748051704] [2021-07-09 17:27:07,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:07,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:07,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:07,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:07,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:07,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:07,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:07,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:07,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:07,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:07,371 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:27:07,468 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_130, v_prenex_126, v_prenex_128], 1=[v_prenex_129, o_0, v_prenex_125, v_prenex_127]} [2021-07-09 17:27:07,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:07,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:07,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,655 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-07-09 17:27:07,656 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.3 percent of original size [2021-07-09 17:27:07,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:27:07,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:07,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:07,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_129 vanished before elimination [2021-07-09 17:27:07,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:07,874 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:07,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:07,943 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:08,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:08,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:08,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:08,009 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:08,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:08,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:27:08,071 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-07-09 17:27:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:08,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748051704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:08,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:08,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:08,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059850536] [2021-07-09 17:27:08,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:08,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:08,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:08,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:08,214 INFO L87 Difference]: Start difference. First operand 830 states and 2622 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:09,047 INFO L93 Difference]: Finished difference Result 1315 states and 3946 transitions. [2021-07-09 17:27:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:27:09,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:09,050 INFO L225 Difference]: With dead ends: 1315 [2021-07-09 17:27:09,050 INFO L226 Difference]: Without dead ends: 1224 [2021-07-09 17:27:09,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 996.0ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:27:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-07-09 17:27:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 831. [2021-07-09 17:27:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.169879518072289) internal successors, (2631), 830 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2631 transitions. [2021-07-09 17:27:09,063 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2631 transitions. Word has length 24 [2021-07-09 17:27:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:09,063 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2631 transitions. [2021-07-09 17:27:09,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2631 transitions. [2021-07-09 17:27:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:09,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:09,064 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:09,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:09,265 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:09,265 INFO L82 PathProgramCache]: Analyzing trace with hash 757163746, now seen corresponding path program 41 times [2021-07-09 17:27:09,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:09,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933028850] [2021-07-09 17:27:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:09,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933028850] [2021-07-09 17:27:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933028850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276022827] [2021-07-09 17:27:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:09,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:09,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:09,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:09,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:09,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:09,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:27:09,713 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_135], 1=[o_0, v_prenex_134]} [2021-07-09 17:27:09,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:09,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:09,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:09,769 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:09,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:09,793 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:09,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:09,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-07-09 17:27:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:09,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276022827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:09,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:09,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951227971] [2021-07-09 17:27:09,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:09,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:09,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:09,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:09,908 INFO L87 Difference]: Start difference. First operand 831 states and 2631 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:10,337 INFO L93 Difference]: Finished difference Result 1058 states and 3277 transitions. [2021-07-09 17:27:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:10,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:10,341 INFO L225 Difference]: With dead ends: 1058 [2021-07-09 17:27:10,341 INFO L226 Difference]: Without dead ends: 1020 [2021-07-09 17:27:10,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-07-09 17:27:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 842. [2021-07-09 17:27:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.173602853745541) internal successors, (2669), 841 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2669 transitions. [2021-07-09 17:27:10,361 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2669 transitions. Word has length 24 [2021-07-09 17:27:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:10,361 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2669 transitions. [2021-07-09 17:27:10,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2669 transitions. [2021-07-09 17:27:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:10,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:10,363 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:10,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:10,563 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2090599668, now seen corresponding path program 42 times [2021-07-09 17:27:10,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:10,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11839174] [2021-07-09 17:27:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:10,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:10,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11839174] [2021-07-09 17:27:10,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11839174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:10,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105674236] [2021-07-09 17:27:10,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:10,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:10,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:10,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:10,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:10,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:10,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:10,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:27:11,021 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_140], 1=[o_2, v_prenex_139]} [2021-07-09 17:27:11,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:11,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:11,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:11,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:11,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:11,081 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:11,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:11,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:11,104 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:11,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:11,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:11,125 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-07-09 17:27:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:11,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105674236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:11,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:11,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:11,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064555985] [2021-07-09 17:27:11,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:11,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:11,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:11,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:11,206 INFO L87 Difference]: Start difference. First operand 842 states and 2669 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:11,602 INFO L93 Difference]: Finished difference Result 1061 states and 3283 transitions. [2021-07-09 17:27:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:11,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:11,604 INFO L225 Difference]: With dead ends: 1061 [2021-07-09 17:27:11,604 INFO L226 Difference]: Without dead ends: 999 [2021-07-09 17:27:11,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-09 17:27:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 842. [2021-07-09 17:27:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.173602853745541) internal successors, (2669), 841 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2669 transitions. [2021-07-09 17:27:11,615 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2669 transitions. Word has length 24 [2021-07-09 17:27:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:11,615 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2669 transitions. [2021-07-09 17:27:11,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2669 transitions. [2021-07-09 17:27:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:11,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:11,617 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:11,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:11,817 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1459395166, now seen corresponding path program 43 times [2021-07-09 17:27:11,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:11,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572683775] [2021-07-09 17:27:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:12,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:12,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572683775] [2021-07-09 17:27:12,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572683775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:12,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63860559] [2021-07-09 17:27:12,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:12,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:12,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:12,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:12,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:12,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:12,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:12,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:12,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:27:12,426 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_151, v_prenex_147, v_prenex_149], 1=[o_2, v_prenex_150, v_prenex_146, v_prenex_148]} [2021-07-09 17:27:12,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:12,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:12,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,612 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-07-09 17:27:12,612 INFO L628 ElimStorePlain]: treesize reduction 150, result has 55.0 percent of original size [2021-07-09 17:27:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:12,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:27:12,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:27:12,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:12,764 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:12,851 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:12,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:12,922 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:12,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,989 INFO L518 ElimStorePlain]: Eliminatee v_prenex_146 vanished before elimination [2021-07-09 17:27:12,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:12,994 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:13,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:13,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:27:13,058 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-07-09 17:27:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:13,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63860559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:13,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:13,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:13,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001302289] [2021-07-09 17:27:13,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:13,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:13,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:13,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:13,211 INFO L87 Difference]: Start difference. First operand 842 states and 2669 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:14,213 INFO L93 Difference]: Finished difference Result 1307 states and 4004 transitions. [2021-07-09 17:27:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:27:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:14,215 INFO L225 Difference]: With dead ends: 1307 [2021-07-09 17:27:14,215 INFO L226 Difference]: Without dead ends: 1227 [2021-07-09 17:27:14,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1038.6ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:27:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-09 17:27:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 856. [2021-07-09 17:27:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.1883040935672513) internal successors, (2726), 855 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2726 transitions. [2021-07-09 17:27:14,228 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2726 transitions. Word has length 24 [2021-07-09 17:27:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:14,228 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2726 transitions. [2021-07-09 17:27:14,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2726 transitions. [2021-07-09 17:27:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:14,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:14,229 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:14,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-09 17:27:14,430 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash 491691884, now seen corresponding path program 44 times [2021-07-09 17:27:14,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:14,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756386153] [2021-07-09 17:27:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:14,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:14,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756386153] [2021-07-09 17:27:14,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756386153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132369172] [2021-07-09 17:27:14,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:14,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:14,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:14,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:14,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:14,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:14,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:14,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:14,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:14,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:14,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:14,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:14,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:14,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:14,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:14,924 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:27:15,034 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_160, o_4, v_prenex_162, v_prenex_158], 1=[o_2, v_prenex_161, v_prenex_157, v_prenex_159]} [2021-07-09 17:27:15,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:15,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:15,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:15,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:15,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:15,251 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:15,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:15,299 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:15,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:15,346 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:15,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:15,392 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:15,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:15,435 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-07-09 17:27:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:15,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132369172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:15,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:15,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:15,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267182076] [2021-07-09 17:27:15,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:15,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:15,565 INFO L87 Difference]: Start difference. First operand 856 states and 2726 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:16,657 INFO L93 Difference]: Finished difference Result 1313 states and 3978 transitions. [2021-07-09 17:27:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:27:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:16,659 INFO L225 Difference]: With dead ends: 1313 [2021-07-09 17:27:16,659 INFO L226 Difference]: Without dead ends: 1251 [2021-07-09 17:27:16,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1086.7ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:27:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-07-09 17:27:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 862. [2021-07-09 17:27:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.1951219512195124) internal successors, (2751), 861 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2751 transitions. [2021-07-09 17:27:16,671 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2751 transitions. Word has length 24 [2021-07-09 17:27:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:16,671 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2751 transitions. [2021-07-09 17:27:16,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2751 transitions. [2021-07-09 17:27:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:16,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:16,673 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:16,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-09 17:27:16,873 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash -685190796, now seen corresponding path program 45 times [2021-07-09 17:27:16,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:16,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057845276] [2021-07-09 17:27:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:17,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:17,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057845276] [2021-07-09 17:27:17,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057845276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:17,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980554207] [2021-07-09 17:27:17,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:17,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:17,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:17,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:17,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:17,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:17,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:17,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:17,329 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:27:17,452 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_169], 1=[o_2, v_prenex_168]} [2021-07-09 17:27:17,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:17,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:17,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:17,507 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:17,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:17,532 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:17,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:17,553 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-07-09 17:27:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:17,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980554207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:17,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:17,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:17,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183576359] [2021-07-09 17:27:17,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:17,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:17,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:17,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:17,638 INFO L87 Difference]: Start difference. First operand 862 states and 2751 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:18,303 INFO L93 Difference]: Finished difference Result 1309 states and 4020 transitions. [2021-07-09 17:27:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:27:18,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:18,305 INFO L225 Difference]: With dead ends: 1309 [2021-07-09 17:27:18,305 INFO L226 Difference]: Without dead ends: 1220 [2021-07-09 17:27:18,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 682.5ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:27:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-07-09 17:27:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 866. [2021-07-09 17:27:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.2023121387283235) internal successors, (2770), 865 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2770 transitions. [2021-07-09 17:27:18,318 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2770 transitions. Word has length 24 [2021-07-09 17:27:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:18,318 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2770 transitions. [2021-07-09 17:27:18,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2770 transitions. [2021-07-09 17:27:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:18,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:18,320 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:18,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:18,522 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:18,523 INFO L82 PathProgramCache]: Analyzing trace with hash 29968912, now seen corresponding path program 46 times [2021-07-09 17:27:18,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:18,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883843568] [2021-07-09 17:27:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:18,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883843568] [2021-07-09 17:27:18,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883843568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348710580] [2021-07-09 17:27:18,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:18,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:27:18,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:18,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:27:18,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:18,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:18,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:18,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:27:18,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:18,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:18,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:18,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:18,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:18,913 INFO L518 ElimStorePlain]: Eliminatee v_prenex_173 vanished before elimination [2021-07-09 17:27:18,913 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:27:18,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:18,913 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:27:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348710580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:19,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:19,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:27:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100445672] [2021-07-09 17:27:19,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:27:19,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:27:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:19,018 INFO L87 Difference]: Start difference. First operand 866 states and 2770 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:19,405 INFO L93 Difference]: Finished difference Result 1194 states and 3711 transitions. [2021-07-09 17:27:19,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:19,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:19,407 INFO L225 Difference]: With dead ends: 1194 [2021-07-09 17:27:19,407 INFO L226 Difference]: Without dead ends: 1156 [2021-07-09 17:27:19,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-07-09 17:27:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 849. [2021-07-09 17:27:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.1827830188679247) internal successors, (2699), 848 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2699 transitions. [2021-07-09 17:27:19,419 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2699 transitions. Word has length 24 [2021-07-09 17:27:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:19,419 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2699 transitions. [2021-07-09 17:27:19,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2699 transitions. [2021-07-09 17:27:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:19,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:19,420 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:19,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:19,621 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash -277826534, now seen corresponding path program 47 times [2021-07-09 17:27:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:19,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752624540] [2021-07-09 17:27:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:19,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:19,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752624540] [2021-07-09 17:27:19,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752624540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:19,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522195247] [2021-07-09 17:27:19,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:19,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:27:19,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:19,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:27:19,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:19,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:19,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:19,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:25 [2021-07-09 17:27:19,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:20,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:20,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:20,035 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:27:20,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-07-09 17:27:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:20,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522195247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:20,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:27:20,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070991605] [2021-07-09 17:27:20,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:27:20,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:27:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:20,124 INFO L87 Difference]: Start difference. First operand 849 states and 2699 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:20,615 INFO L93 Difference]: Finished difference Result 1220 states and 3805 transitions. [2021-07-09 17:27:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:20,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:20,617 INFO L225 Difference]: With dead ends: 1220 [2021-07-09 17:27:20,617 INFO L226 Difference]: Without dead ends: 1161 [2021-07-09 17:27:20,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-09 17:27:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 834. [2021-07-09 17:27:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.163265306122449) internal successors, (2635), 833 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2635 transitions. [2021-07-09 17:27:20,629 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2635 transitions. Word has length 24 [2021-07-09 17:27:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:20,629 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 2635 transitions. [2021-07-09 17:27:20,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2635 transitions. [2021-07-09 17:27:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:20,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:20,630 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:20,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,831 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1267757964, now seen corresponding path program 48 times [2021-07-09 17:27:20,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:20,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472011472] [2021-07-09 17:27:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:21,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472011472] [2021-07-09 17:27:21,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472011472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346304070] [2021-07-09 17:27:21,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:21,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:21,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:27:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:21,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:27:21,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:21,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:27:21,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:21,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:21,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:21,222 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:27:21,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:21,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:21,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:21,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:21,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:21,318 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:27:21,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:21,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-07-09 17:27:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:21,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346304070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:21,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:21,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382658971] [2021-07-09 17:27:21,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:21,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:21,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:21,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:21,424 INFO L87 Difference]: Start difference. First operand 834 states and 2635 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:21,859 INFO L93 Difference]: Finished difference Result 1473 states and 4590 transitions. [2021-07-09 17:27:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:21,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:21,861 INFO L225 Difference]: With dead ends: 1473 [2021-07-09 17:27:21,861 INFO L226 Difference]: Without dead ends: 1411 [2021-07-09 17:27:21,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-07-09 17:27:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 847. [2021-07-09 17:27:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.1761229314420802) internal successors, (2687), 846 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2687 transitions. [2021-07-09 17:27:21,874 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2687 transitions. Word has length 24 [2021-07-09 17:27:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:21,875 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2687 transitions. [2021-07-09 17:27:21,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2687 transitions. [2021-07-09 17:27:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:21,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:21,876 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:22,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:22,077 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1296783688, now seen corresponding path program 49 times [2021-07-09 17:27:22,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:22,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626253914] [2021-07-09 17:27:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:22,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:22,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626253914] [2021-07-09 17:27:22,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626253914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:22,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367686569] [2021-07-09 17:27:22,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:22,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:22,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:22,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:22,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:22,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:22,467 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:27:22,641 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_182, v_prenex_184, o_4, v_prenex_186], 1=[v_prenex_181, o_2, v_prenex_183, v_prenex_185]} [2021-07-09 17:27:22,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:22,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:22,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:22,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:22,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:22,852 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:22,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:22,900 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:22,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:22,948 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:22,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:22,995 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:23,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:23,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:23,058 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-07-09 17:27:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:23,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367686569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:23,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:23,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:23,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380742923] [2021-07-09 17:27:23,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:23,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:23,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:23,207 INFO L87 Difference]: Start difference. First operand 847 states and 2687 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:23,667 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-09 17:27:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:24,245 INFO L93 Difference]: Finished difference Result 1482 states and 4518 transitions. [2021-07-09 17:27:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:27:24,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:24,248 INFO L225 Difference]: With dead ends: 1482 [2021-07-09 17:27:24,248 INFO L226 Difference]: Without dead ends: 1389 [2021-07-09 17:27:24,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1120.3ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:27:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-07-09 17:27:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 872. [2021-07-09 17:27:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.1986222732491387) internal successors, (2786), 871 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2786 transitions. [2021-07-09 17:27:24,261 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2786 transitions. Word has length 24 [2021-07-09 17:27:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:24,262 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2786 transitions. [2021-07-09 17:27:24,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2786 transitions. [2021-07-09 17:27:24,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:24,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:24,263 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:24,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-07-09 17:27:24,464 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2070988058, now seen corresponding path program 50 times [2021-07-09 17:27:24,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:24,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455846655] [2021-07-09 17:27:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:24,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:24,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455846655] [2021-07-09 17:27:24,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455846655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:24,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768424221] [2021-07-09 17:27:24,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:24,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:24,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:24,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:24,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:24,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:24,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:24,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:24,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:24,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:24,871 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:27:25,066 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_193, o_4], 1=[v_prenex_192, o_2]} [2021-07-09 17:27:25,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:25,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:25,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:25,125 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:25,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:25,160 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:25,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:25,185 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-07-09 17:27:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:25,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768424221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:25,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:25,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:25,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986444287] [2021-07-09 17:27:25,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:25,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:25,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:25,289 INFO L87 Difference]: Start difference. First operand 872 states and 2786 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:26,262 INFO L93 Difference]: Finished difference Result 1461 states and 4493 transitions. [2021-07-09 17:27:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:27:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:26,265 INFO L225 Difference]: With dead ends: 1461 [2021-07-09 17:27:26,265 INFO L226 Difference]: Without dead ends: 1372 [2021-07-09 17:27:26,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:26,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-07-09 17:27:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 876. [2021-07-09 17:27:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.2057142857142855) internal successors, (2805), 875 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2805 transitions. [2021-07-09 17:27:26,279 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2805 transitions. Word has length 24 [2021-07-09 17:27:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:26,279 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2805 transitions. [2021-07-09 17:27:26,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2805 transitions. [2021-07-09 17:27:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:26,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:26,280 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:26,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:26,497 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1908982828, now seen corresponding path program 51 times [2021-07-09 17:27:26,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:26,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264457019] [2021-07-09 17:27:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:26,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:26,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264457019] [2021-07-09 17:27:26,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264457019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:26,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697561908] [2021-07-09 17:27:26,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:26,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:26,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:26,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:26,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:26,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:26,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:26,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:26,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:26,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:26,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:26,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:26,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:26,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:26,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:26,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:26,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:26,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:26,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:27:27,116 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_200], 1=[o_2, v_prenex_199]} [2021-07-09 17:27:27,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:27,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:27,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:27,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:27,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:27,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:27,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:27,170 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:27,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:27,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:27,196 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:27,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:27,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:27,217 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-07-09 17:27:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697561908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:27,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:27,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:27:27,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728057202] [2021-07-09 17:27:27,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:27:27,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:27:27,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:27,317 INFO L87 Difference]: Start difference. First operand 876 states and 2805 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:28,176 INFO L93 Difference]: Finished difference Result 1767 states and 5570 transitions. [2021-07-09 17:27:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:27:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:28,180 INFO L225 Difference]: With dead ends: 1767 [2021-07-09 17:27:28,180 INFO L226 Difference]: Without dead ends: 1705 [2021-07-09 17:27:28,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 914.0ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:27:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-09 17:27:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 854. [2021-07-09 17:27:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.175849941383353) internal successors, (2709), 853 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2709 transitions. [2021-07-09 17:27:28,195 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2709 transitions. Word has length 24 [2021-07-09 17:27:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:28,195 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2709 transitions. [2021-07-09 17:27:28,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2709 transitions. [2021-07-09 17:27:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:28,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:28,197 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:28,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-09 17:27:28,397 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 827603342, now seen corresponding path program 52 times [2021-07-09 17:27:28,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:28,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058071874] [2021-07-09 17:27:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:28,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058071874] [2021-07-09 17:27:28,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058071874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353695477] [2021-07-09 17:27:28,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:28,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:28,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:28,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:28,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:27:28,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:28,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:28,670 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:49 [2021-07-09 17:27:28,773 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:28,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:28,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:28,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,802 INFO L628 ElimStorePlain]: treesize reduction 38, result has 43.3 percent of original size [2021-07-09 17:27:28,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:28,806 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:28,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:28,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,814 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2021-07-09 17:27:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:28,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353695477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:28,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:28,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:28,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875952916] [2021-07-09 17:27:28,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:28,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:28,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:28,847 INFO L87 Difference]: Start difference. First operand 854 states and 2709 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:29,032 INFO L93 Difference]: Finished difference Result 1018 states and 3105 transitions. [2021-07-09 17:27:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:29,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:29,034 INFO L225 Difference]: With dead ends: 1018 [2021-07-09 17:27:29,034 INFO L226 Difference]: Without dead ends: 945 [2021-07-09 17:27:29,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-09 17:27:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 860. [2021-07-09 17:27:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.171129220023283) internal successors, (2724), 859 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2724 transitions. [2021-07-09 17:27:29,044 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2724 transitions. Word has length 24 [2021-07-09 17:27:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:29,044 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2724 transitions. [2021-07-09 17:27:29,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2724 transitions. [2021-07-09 17:27:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:29,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:29,046 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:29,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-09 17:27:29,246 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:29,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1274656876, now seen corresponding path program 53 times [2021-07-09 17:27:29,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:29,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539688893] [2021-07-09 17:27:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:29,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539688893] [2021-07-09 17:27:29,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539688893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421046697] [2021-07-09 17:27:29,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:29,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:29,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:29,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:29,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:29,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:29,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:29,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:29,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:41 [2021-07-09 17:27:29,635 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:29,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:29,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:29,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:29,661 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:29,664 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:29,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:29,681 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-07-09 17:27:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:29,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421046697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:29,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:27:29,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922795250] [2021-07-09 17:27:29,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:27:29,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:27:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:29,722 INFO L87 Difference]: Start difference. First operand 860 states and 2724 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:30,214 INFO L93 Difference]: Finished difference Result 1041 states and 3212 transitions. [2021-07-09 17:27:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:27:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:30,216 INFO L225 Difference]: With dead ends: 1041 [2021-07-09 17:27:30,216 INFO L226 Difference]: Without dead ends: 982 [2021-07-09 17:27:30,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-07-09 17:27:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 860. [2021-07-09 17:27:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.171129220023283) internal successors, (2724), 859 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2724 transitions. [2021-07-09 17:27:30,227 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2724 transitions. Word has length 24 [2021-07-09 17:27:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:30,227 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2724 transitions. [2021-07-09 17:27:30,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2724 transitions. [2021-07-09 17:27:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:30,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:30,229 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:30,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-09 17:27:30,445 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1282338604, now seen corresponding path program 54 times [2021-07-09 17:27:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:30,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010116233] [2021-07-09 17:27:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:30,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:30,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010116233] [2021-07-09 17:27:30,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010116233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:30,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703885899] [2021-07-09 17:27:30,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:30,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:30,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:30,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:30,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:30,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:30,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:30,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:30,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:30,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:30,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:30,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:30,768 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:41 [2021-07-09 17:27:30,847 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_205], 1=[o_0, v_prenex_204]} [2021-07-09 17:27:30,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:30,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:30,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:30,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:30,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:30,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:30,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:30,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:30,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:30,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:30,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:30,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:30,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:30,957 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:30,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:30,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:30,961 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:31,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:31,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:31,004 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:31,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:31,008 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:31,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:31,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:31,047 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-07-09 17:27:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:31,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703885899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:31,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697438681] [2021-07-09 17:27:31,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:31,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:31,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:31,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:31,145 INFO L87 Difference]: Start difference. First operand 860 states and 2724 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:31,830 INFO L93 Difference]: Finished difference Result 1044 states and 3226 transitions. [2021-07-09 17:27:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:27:31,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:31,832 INFO L225 Difference]: With dead ends: 1044 [2021-07-09 17:27:31,832 INFO L226 Difference]: Without dead ends: 995 [2021-07-09 17:27:31,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-07-09 17:27:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 860. [2021-07-09 17:27:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.171129220023283) internal successors, (2724), 859 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2724 transitions. [2021-07-09 17:27:31,843 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2724 transitions. Word has length 24 [2021-07-09 17:27:31,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:31,843 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2724 transitions. [2021-07-09 17:27:31,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2724 transitions. [2021-07-09 17:27:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:31,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:31,845 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:32,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-09 17:27:32,056 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:32,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1261019758, now seen corresponding path program 55 times [2021-07-09 17:27:32,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:32,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368480779] [2021-07-09 17:27:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:32,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:32,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368480779] [2021-07-09 17:27:32,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368480779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022888730] [2021-07-09 17:27:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:32,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:32,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:27:32,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:32,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:32,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:59 [2021-07-09 17:27:32,423 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:32,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:32,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:32,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,451 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:27:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:32,454 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:32,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,462 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:12 [2021-07-09 17:27:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:32,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022888730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:32,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405626099] [2021-07-09 17:27:32,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:32,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:32,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:32,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:32,497 INFO L87 Difference]: Start difference. First operand 860 states and 2724 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:32,716 INFO L93 Difference]: Finished difference Result 939 states and 2912 transitions. [2021-07-09 17:27:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:32,717 INFO L225 Difference]: With dead ends: 939 [2021-07-09 17:27:32,717 INFO L226 Difference]: Without dead ends: 880 [2021-07-09 17:27:32,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-07-09 17:27:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 862. [2021-07-09 17:27:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.1695702671312427) internal successors, (2729), 861 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2729 transitions. [2021-07-09 17:27:32,736 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2729 transitions. Word has length 24 [2021-07-09 17:27:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:32,736 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2729 transitions. [2021-07-09 17:27:32,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2729 transitions. [2021-07-09 17:27:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:32,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:32,738 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:32,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,938 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -476952058, now seen corresponding path program 56 times [2021-07-09 17:27:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:32,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570247276] [2021-07-09 17:27:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:33,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:33,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570247276] [2021-07-09 17:27:33,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570247276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:33,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283939413] [2021-07-09 17:27:33,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:33,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:27:33,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:33,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:33,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:33,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:55 [2021-07-09 17:27:33,332 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_209, o_4], 1=[o_0, v_prenex_208]} [2021-07-09 17:27:33,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:33,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:33,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:33,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:33,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:33,380 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:33,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:33,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:33,403 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:33,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:33,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:33,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-07-09 17:27:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:33,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283939413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:33,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:33,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:33,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71670081] [2021-07-09 17:27:33,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:33,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:33,499 INFO L87 Difference]: Start difference. First operand 862 states and 2729 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:33,710 INFO L93 Difference]: Finished difference Result 931 states and 2904 transitions. [2021-07-09 17:27:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:33,713 INFO L225 Difference]: With dead ends: 931 [2021-07-09 17:27:33,713 INFO L226 Difference]: Without dead ends: 896 [2021-07-09 17:27:33,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-09 17:27:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 862. [2021-07-09 17:27:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.1695702671312427) internal successors, (2729), 861 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2729 transitions. [2021-07-09 17:27:33,725 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2729 transitions. Word has length 24 [2021-07-09 17:27:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:33,725 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2729 transitions. [2021-07-09 17:27:33,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2729 transitions. [2021-07-09 17:27:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:33,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:33,727 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:33,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-07-09 17:27:33,944 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1014444914, now seen corresponding path program 57 times [2021-07-09 17:27:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:33,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496638986] [2021-07-09 17:27:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:34,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:34,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496638986] [2021-07-09 17:27:34,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496638986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619968007] [2021-07-09 17:27:34,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:34,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:34,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:34,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:34,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:34,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:34,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:34,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:34,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:87, output treesize:77 [2021-07-09 17:27:34,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:34,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:34,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:34,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:34,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:34,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:34,437 INFO L628 ElimStorePlain]: treesize reduction 56, result has 60.8 percent of original size [2021-07-09 17:27:34,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:34,442 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:34,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:34,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:34,445 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:34,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:34,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:27:34,477 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:189, output treesize:47 [2021-07-09 17:27:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:34,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619968007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:34,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526758913] [2021-07-09 17:27:34,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:34,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:34,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:34,553 INFO L87 Difference]: Start difference. First operand 862 states and 2729 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:34,828 INFO L93 Difference]: Finished difference Result 935 states and 2902 transitions. [2021-07-09 17:27:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:34,830 INFO L225 Difference]: With dead ends: 935 [2021-07-09 17:27:34,830 INFO L226 Difference]: Without dead ends: 882 [2021-07-09 17:27:34,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-09 17:27:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 864. [2021-07-09 17:27:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.168018539976825) internal successors, (2734), 863 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2734 transitions. [2021-07-09 17:27:34,841 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2734 transitions. Word has length 24 [2021-07-09 17:27:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:34,841 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2734 transitions. [2021-07-09 17:27:34,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2734 transitions. [2021-07-09 17:27:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:34,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:34,842 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:35,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:35,059 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash -952364244, now seen corresponding path program 58 times [2021-07-09 17:27:35,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:35,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319604169] [2021-07-09 17:27:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:35,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319604169] [2021-07-09 17:27:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319604169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848803167] [2021-07-09 17:27:35,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:35,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:35,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:35,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:35,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:35,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:35,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:35,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:35,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:35,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:35,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:27:35,578 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:35,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:35,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:35,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,606 INFO L628 ElimStorePlain]: treesize reduction 38, result has 43.3 percent of original size [2021-07-09 17:27:35,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:35,609 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:35,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2021-07-09 17:27:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:35,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848803167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:35,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:35,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960021199] [2021-07-09 17:27:35,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:35,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:35,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:35,653 INFO L87 Difference]: Start difference. First operand 864 states and 2734 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:36,215 INFO L93 Difference]: Finished difference Result 1331 states and 3917 transitions. [2021-07-09 17:27:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:27:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:36,217 INFO L225 Difference]: With dead ends: 1331 [2021-07-09 17:27:36,217 INFO L226 Difference]: Without dead ends: 1231 [2021-07-09 17:27:36,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-07-09 17:27:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 879. [2021-07-09 17:27:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.1662870159453305) internal successors, (2780), 878 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2780 transitions. [2021-07-09 17:27:36,230 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2780 transitions. Word has length 24 [2021-07-09 17:27:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:36,230 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2780 transitions. [2021-07-09 17:27:36,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2780 transitions. [2021-07-09 17:27:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:36,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:36,232 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:36,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 17:27:36,433 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1240342834, now seen corresponding path program 59 times [2021-07-09 17:27:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:36,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518516154] [2021-07-09 17:27:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:36,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:36,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518516154] [2021-07-09 17:27:36,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518516154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:36,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340543936] [2021-07-09 17:27:36,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:36,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:36,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:36,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:36,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:36,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:36,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:36,700 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-07-09 17:27:36,877 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:36,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:36,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:36,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:36,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:36,906 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:36,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:36,910 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:36,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:36,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:36,933 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-07-09 17:27:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:36,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340543936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:36,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:36,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:36,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176850584] [2021-07-09 17:27:36,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:36,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:36,984 INFO L87 Difference]: Start difference. First operand 879 states and 2780 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:38,142 INFO L93 Difference]: Finished difference Result 1281 states and 3847 transitions. [2021-07-09 17:27:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:27:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:38,144 INFO L225 Difference]: With dead ends: 1281 [2021-07-09 17:27:38,145 INFO L226 Difference]: Without dead ends: 1195 [2021-07-09 17:27:38,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1114.0ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:27:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-07-09 17:27:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 892. [2021-07-09 17:27:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.1683501683501682) internal successors, (2823), 891 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2823 transitions. [2021-07-09 17:27:38,158 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2823 transitions. Word has length 24 [2021-07-09 17:27:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:38,158 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2823 transitions. [2021-07-09 17:27:38,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2823 transitions. [2021-07-09 17:27:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:38,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:38,159 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:38,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:38,360 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -497628982, now seen corresponding path program 60 times [2021-07-09 17:27:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:38,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462189562] [2021-07-09 17:27:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:38,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:38,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462189562] [2021-07-09 17:27:38,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462189562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:38,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680003381] [2021-07-09 17:27:38,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:38,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:38,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:38,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:38,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:38,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:38,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:38,681 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:27:38,844 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_218, o_4], 1=[v_prenex_217, o_0]} [2021-07-09 17:27:38,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:38,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:38,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:38,893 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:38,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:38,913 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:38,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:38,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-07-09 17:27:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:38,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680003381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:38,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:38,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:38,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112006843] [2021-07-09 17:27:38,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:38,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:38,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:38,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:38,999 INFO L87 Difference]: Start difference. First operand 892 states and 2823 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:39,701 INFO L93 Difference]: Finished difference Result 1307 states and 3882 transitions. [2021-07-09 17:27:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:27:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:39,703 INFO L225 Difference]: With dead ends: 1307 [2021-07-09 17:27:39,703 INFO L226 Difference]: Without dead ends: 1233 [2021-07-09 17:27:39,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 808.5ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:27:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-09 17:27:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 894. [2021-07-09 17:27:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.1713325867861144) internal successors, (2832), 893 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2832 transitions. [2021-07-09 17:27:39,716 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2832 transitions. Word has length 24 [2021-07-09 17:27:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:39,716 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 2832 transitions. [2021-07-09 17:27:39,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2832 transitions. [2021-07-09 17:27:39,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:39,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:39,718 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:39,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:39,919 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:39,919 INFO L82 PathProgramCache]: Analyzing trace with hash -786675028, now seen corresponding path program 61 times [2021-07-09 17:27:39,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:39,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750851969] [2021-07-09 17:27:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:40,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:40,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750851969] [2021-07-09 17:27:40,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750851969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:40,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715773637] [2021-07-09 17:27:40,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:40,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:40,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:40,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:40,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:40,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:40,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:40,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:40,230 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:27:40,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:27:40,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:27:40,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:27:40,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:27:40,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,437 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-07-09 17:27:40,437 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:27:40,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,438 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-07-09 17:27:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:40,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715773637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:40,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:40,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:27:40,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038666911] [2021-07-09 17:27:40,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:40,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:40,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:40,472 INFO L87 Difference]: Start difference. First operand 894 states and 2832 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:40,756 INFO L93 Difference]: Finished difference Result 1169 states and 3525 transitions. [2021-07-09 17:27:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:40,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:40,758 INFO L225 Difference]: With dead ends: 1169 [2021-07-09 17:27:40,758 INFO L226 Difference]: Without dead ends: 1084 [2021-07-09 17:27:40,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-07-09 17:27:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 887. [2021-07-09 17:27:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.1659142212189617) internal successors, (2805), 886 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2805 transitions. [2021-07-09 17:27:40,770 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2805 transitions. Word has length 24 [2021-07-09 17:27:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:40,770 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2805 transitions. [2021-07-09 17:27:40,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2805 transitions. [2021-07-09 17:27:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:40,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:40,771 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:40,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:40,972 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1760539924, now seen corresponding path program 62 times [2021-07-09 17:27:40,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:40,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768158790] [2021-07-09 17:27:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:41,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:41,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768158790] [2021-07-09 17:27:41,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768158790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:41,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6537857] [2021-07-09 17:27:41,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:41,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:41,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:41,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:41,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:41,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:41,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:41,219 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-07-09 17:27:41,340 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:27:41,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:41,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:41,350 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:41,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-07-09 17:27:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6537857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:41,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:41,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773320337] [2021-07-09 17:27:41,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:41,391 INFO L87 Difference]: Start difference. First operand 887 states and 2805 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:41,991 INFO L93 Difference]: Finished difference Result 1111 states and 3448 transitions. [2021-07-09 17:27:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:41,994 INFO L225 Difference]: With dead ends: 1111 [2021-07-09 17:27:41,994 INFO L226 Difference]: Without dead ends: 1080 [2021-07-09 17:27:41,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-07-09 17:27:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 891. [2021-07-09 17:27:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.1707865168539326) internal successors, (2822), 890 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2822 transitions. [2021-07-09 17:27:42,005 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2822 transitions. Word has length 24 [2021-07-09 17:27:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:42,005 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 2822 transitions. [2021-07-09 17:27:42,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2822 transitions. [2021-07-09 17:27:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:42,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:42,007 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:42,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 17:27:42,208 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1849057620, now seen corresponding path program 63 times [2021-07-09 17:27:42,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:42,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331040954] [2021-07-09 17:27:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:42,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:42,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331040954] [2021-07-09 17:27:42,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331040954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:42,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740941278] [2021-07-09 17:27:42,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:42,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:42,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:42,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:42,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:42,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:42,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:42,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-07-09 17:27:42,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:42,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:42,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:42,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:42,895 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:42,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:42,899 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:42,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:42,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:42,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:42,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:43,031 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:43,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:43,035 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:43,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:43,093 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-07-09 17:27:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:43,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740941278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:43,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:43,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:43,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334763145] [2021-07-09 17:27:43,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:43,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:43,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:43,212 INFO L87 Difference]: Start difference. First operand 891 states and 2822 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:44,270 INFO L93 Difference]: Finished difference Result 1348 states and 4026 transitions. [2021-07-09 17:27:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:27:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:44,273 INFO L225 Difference]: With dead ends: 1348 [2021-07-09 17:27:44,273 INFO L226 Difference]: Without dead ends: 1255 [2021-07-09 17:27:44,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1080.7ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:27:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-07-09 17:27:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 891. [2021-07-09 17:27:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.1707865168539326) internal successors, (2822), 890 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2822 transitions. [2021-07-09 17:27:44,285 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2822 transitions. Word has length 24 [2021-07-09 17:27:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:44,285 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 2822 transitions. [2021-07-09 17:27:44,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2822 transitions. [2021-07-09 17:27:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:44,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:44,287 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:44,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:44,488 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1952155890, now seen corresponding path program 64 times [2021-07-09 17:27:44,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:44,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117280811] [2021-07-09 17:27:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:44,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:44,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117280811] [2021-07-09 17:27:44,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117280811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:44,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131977881] [2021-07-09 17:27:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:44,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:44,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:44,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:44,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:44,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:44,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:44,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:44,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:44,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:44,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:44,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:44,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:44,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:44,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:44,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:44,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:44,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:27:45,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:45,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:45,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,159 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-07-09 17:27:45,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:45,163 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:45,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:45,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-07-09 17:27:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:45,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131977881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:45,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:45,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:45,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453705831] [2021-07-09 17:27:45,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:45,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:45,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:45,219 INFO L87 Difference]: Start difference. First operand 891 states and 2822 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:45,703 INFO L93 Difference]: Finished difference Result 1167 states and 3558 transitions. [2021-07-09 17:27:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:45,706 INFO L225 Difference]: With dead ends: 1167 [2021-07-09 17:27:45,706 INFO L226 Difference]: Without dead ends: 1072 [2021-07-09 17:27:45,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 604.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-07-09 17:27:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 882. [2021-07-09 17:27:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.163450624290579) internal successors, (2787), 881 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2787 transitions. [2021-07-09 17:27:45,717 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2787 transitions. Word has length 24 [2021-07-09 17:27:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:45,717 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2787 transitions. [2021-07-09 17:27:45,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2787 transitions. [2021-07-09 17:27:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:45,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:45,719 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:45,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-09 17:27:45,919 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash 631569172, now seen corresponding path program 65 times [2021-07-09 17:27:45,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:45,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383312906] [2021-07-09 17:27:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:46,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:46,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383312906] [2021-07-09 17:27:46,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383312906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:46,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604856409] [2021-07-09 17:27:46,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:46,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:27:46,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:46,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:46,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:46,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:46,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:46,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:46,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:46,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:27:46,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:46,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:46,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:46,682 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:46,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:46,712 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:46,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:46,739 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:37 [2021-07-09 17:27:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:46,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604856409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:46,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:46,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:46,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648633109] [2021-07-09 17:27:46,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:46,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:46,828 INFO L87 Difference]: Start difference. First operand 882 states and 2787 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:47,741 INFO L93 Difference]: Finished difference Result 1282 states and 3898 transitions. [2021-07-09 17:27:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:27:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:47,744 INFO L225 Difference]: With dead ends: 1282 [2021-07-09 17:27:47,744 INFO L226 Difference]: Without dead ends: 1205 [2021-07-09 17:27:47,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 943.9ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-07-09 17:27:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 876. [2021-07-09 17:27:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.1645714285714286) internal successors, (2769), 875 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2769 transitions. [2021-07-09 17:27:47,756 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2769 transitions. Word has length 24 [2021-07-09 17:27:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:47,756 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2769 transitions. [2021-07-09 17:27:47,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2769 transitions. [2021-07-09 17:27:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:47,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:47,757 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-09 17:27:47,958 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1978562356, now seen corresponding path program 66 times [2021-07-09 17:27:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799860432] [2021-07-09 17:27:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:48,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:48,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799860432] [2021-07-09 17:27:48,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799860432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:48,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110214846] [2021-07-09 17:27:48,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:48,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:48,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:48,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:48,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:27:48,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:48,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-07-09 17:27:48,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:48,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:48,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,565 INFO L628 ElimStorePlain]: treesize reduction 55, result has 38.2 percent of original size [2021-07-09 17:27:48,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:48,569 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:48,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,580 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-07-09 17:27:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:48,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110214846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:48,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:48,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:48,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262811484] [2021-07-09 17:27:48,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:48,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:48,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:48,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:48,618 INFO L87 Difference]: Start difference. First operand 876 states and 2769 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:48,887 INFO L93 Difference]: Finished difference Result 956 states and 2961 transitions. [2021-07-09 17:27:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:48,889 INFO L225 Difference]: With dead ends: 956 [2021-07-09 17:27:48,889 INFO L226 Difference]: Without dead ends: 897 [2021-07-09 17:27:48,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-07-09 17:27:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 877. [2021-07-09 17:27:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.165525114155251) internal successors, (2773), 876 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2773 transitions. [2021-07-09 17:27:48,899 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2773 transitions. Word has length 24 [2021-07-09 17:27:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:48,899 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2773 transitions. [2021-07-09 17:27:48,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2773 transitions. [2021-07-09 17:27:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:48,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:48,900 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:49,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:49,105 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash 578433124, now seen corresponding path program 67 times [2021-07-09 17:27:49,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:49,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847169399] [2021-07-09 17:27:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:49,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847169399] [2021-07-09 17:27:49,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847169399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364719376] [2021-07-09 17:27:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:49,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:49,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:49,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:49,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:49,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:49,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:27:49,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:49,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:49,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:49,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-07-09 17:27:49,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:49,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:49,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:49,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:49,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:49,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:49,722 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:49,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:49,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:49,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:49,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:49,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:49,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:49,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:49,780 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:49,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:49,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:49,803 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:27 [2021-07-09 17:27:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:49,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364719376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:49,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:49,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:49,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245516456] [2021-07-09 17:27:49,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:49,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:49,875 INFO L87 Difference]: Start difference. First operand 877 states and 2773 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:50,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:50,087 INFO L93 Difference]: Finished difference Result 948 states and 2953 transitions. [2021-07-09 17:27:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:50,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:50,089 INFO L225 Difference]: With dead ends: 948 [2021-07-09 17:27:50,089 INFO L226 Difference]: Without dead ends: 913 [2021-07-09 17:27:50,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-07-09 17:27:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 879. [2021-07-09 17:27:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.164009111617312) internal successors, (2778), 878 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2778 transitions. [2021-07-09 17:27:50,099 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2778 transitions. Word has length 24 [2021-07-09 17:27:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:50,099 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2778 transitions. [2021-07-09 17:27:50,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2778 transitions. [2021-07-09 17:27:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:50,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:50,101 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:50,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-09 17:27:50,301 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:50,302 INFO L82 PathProgramCache]: Analyzing trace with hash 40940268, now seen corresponding path program 68 times [2021-07-09 17:27:50,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:50,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436456659] [2021-07-09 17:27:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:50,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436456659] [2021-07-09 17:27:50,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436456659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53649532] [2021-07-09 17:27:50,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:50,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:50,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:50,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:50,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:50,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:50,715 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-07-09 17:27:50,814 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:27:50,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:50,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:50,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:50,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:50,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,945 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-09 17:27:50,946 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.8 percent of original size [2021-07-09 17:27:50,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:27:50,952 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:50,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:50,957 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:51,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:51,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:27:51,011 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-07-09 17:27:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:51,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53649532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:51,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:51,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:27:51,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841694178] [2021-07-09 17:27:51,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:27:51,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:51,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:27:51,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:51,099 INFO L87 Difference]: Start difference. First operand 879 states and 2778 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:51,361 INFO L93 Difference]: Finished difference Result 952 states and 2951 transitions. [2021-07-09 17:27:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:51,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:51,363 INFO L225 Difference]: With dead ends: 952 [2021-07-09 17:27:51,363 INFO L226 Difference]: Without dead ends: 899 [2021-07-09 17:27:51,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-07-09 17:27:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 877. [2021-07-09 17:27:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.165525114155251) internal successors, (2773), 876 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2773 transitions. [2021-07-09 17:27:51,373 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2773 transitions. Word has length 24 [2021-07-09 17:27:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:51,373 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2773 transitions. [2021-07-09 17:27:51,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2773 transitions. [2021-07-09 17:27:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:51,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:51,375 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:51,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-09 17:27:51,576 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1427702638, now seen corresponding path program 69 times [2021-07-09 17:27:51,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:51,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486534839] [2021-07-09 17:27:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:51,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:51,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486534839] [2021-07-09 17:27:51,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486534839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:51,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547003796] [2021-07-09 17:27:51,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:51,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:27:51,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:51,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:51,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:51,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:51,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:51,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:51,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:52,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:52,052 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:27:52,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:52,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:52,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:27:52,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:52,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-07-09 17:27:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547003796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586569433] [2021-07-09 17:27:52,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:52,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:52,376 INFO L87 Difference]: Start difference. First operand 877 states and 2773 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:52,860 INFO L93 Difference]: Finished difference Result 990 states and 3070 transitions. [2021-07-09 17:27:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:52,862 INFO L225 Difference]: With dead ends: 990 [2021-07-09 17:27:52,862 INFO L226 Difference]: Without dead ends: 959 [2021-07-09 17:27:52,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-07-09 17:27:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 892. [2021-07-09 17:27:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.166105499438833) internal successors, (2821), 891 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2821 transitions. [2021-07-09 17:27:52,873 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2821 transitions. Word has length 24 [2021-07-09 17:27:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:52,873 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2821 transitions. [2021-07-09 17:27:52,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2821 transitions. [2021-07-09 17:27:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:52,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:52,875 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:53,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:53,075 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash -310269178, now seen corresponding path program 70 times [2021-07-09 17:27:53,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140822009] [2021-07-09 17:27:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:53,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140822009] [2021-07-09 17:27:53,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140822009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685520686] [2021-07-09 17:27:53,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:53,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:53,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:53,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:53,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:53,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:53,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:53,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:53,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:53,497 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:27:53,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:53,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:53,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:53,746 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:53,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:53,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:53,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:53,802 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:53,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:53,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:53,826 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:27 [2021-07-09 17:27:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:53,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685520686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:53,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:53,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:27:53,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247264610] [2021-07-09 17:27:53,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:53,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:53,888 INFO L87 Difference]: Start difference. First operand 892 states and 2821 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:54,287 INFO L93 Difference]: Finished difference Result 1057 states and 3231 transitions. [2021-07-09 17:27:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:54,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:54,289 INFO L225 Difference]: With dead ends: 1057 [2021-07-09 17:27:54,289 INFO L226 Difference]: Without dead ends: 1010 [2021-07-09 17:27:54,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-07-09 17:27:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 892. [2021-07-09 17:27:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.1683501683501682) internal successors, (2823), 891 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2823 transitions. [2021-07-09 17:27:54,301 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2823 transitions. Word has length 24 [2021-07-09 17:27:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:54,301 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2823 transitions. [2021-07-09 17:27:54,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2823 transitions. [2021-07-09 17:27:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:54,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:54,303 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:54,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-07-09 17:27:54,503 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash -90973202, now seen corresponding path program 71 times [2021-07-09 17:27:54,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:54,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239245869] [2021-07-09 17:27:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:54,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:54,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239245869] [2021-07-09 17:27:54,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239245869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:54,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321649634] [2021-07-09 17:27:54,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:54,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:54,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:54,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:54,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:27:54,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-07-09 17:27:54,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:54,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:54,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:55,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:55,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:55,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:55,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:55,030 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:55,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:55,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:55,034 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:55,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:55,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:55,062 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:27:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:27:55,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321649634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:55,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:55,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:55,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282624694] [2021-07-09 17:27:55,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:55,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:55,114 INFO L87 Difference]: Start difference. First operand 892 states and 2823 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:55,678 INFO L93 Difference]: Finished difference Result 1018 states and 3146 transitions. [2021-07-09 17:27:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:55,680 INFO L225 Difference]: With dead ends: 1018 [2021-07-09 17:27:55,680 INFO L226 Difference]: Without dead ends: 955 [2021-07-09 17:27:55,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:27:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-09 17:27:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 887. [2021-07-09 17:27:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.1636568848758464) internal successors, (2803), 886 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2803 transitions. [2021-07-09 17:27:55,696 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2803 transitions. Word has length 24 [2021-07-09 17:27:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:55,696 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2803 transitions. [2021-07-09 17:27:55,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2803 transitions. [2021-07-09 17:27:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:55,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:55,697 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:55,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:55,898 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:55,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2124609682, now seen corresponding path program 72 times [2021-07-09 17:27:55,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:55,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342266785] [2021-07-09 17:27:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:56,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:56,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342266785] [2021-07-09 17:27:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342266785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:56,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142587938] [2021-07-09 17:27:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:56,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:27:56,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:56,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:56,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:56,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:56,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:56,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:56,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:27:56,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:56,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:56,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,743 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-07-09 17:27:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:56,748 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:56,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:56,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:56,817 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:56,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:56,850 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:40 [2021-07-09 17:27:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:56,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142587938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:56,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:56,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:27:56,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693705375] [2021-07-09 17:27:56,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:27:56,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:56,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:27:56,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:56,928 INFO L87 Difference]: Start difference. First operand 887 states and 2803 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:57,495 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-09 17:27:58,008 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-09 17:27:58,486 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-07-09 17:27:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:58,628 INFO L93 Difference]: Finished difference Result 1735 states and 4974 transitions. [2021-07-09 17:27:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:27:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:27:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:58,631 INFO L225 Difference]: With dead ends: 1735 [2021-07-09 17:27:58,631 INFO L226 Difference]: Without dead ends: 1559 [2021-07-09 17:27:58,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1705.9ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:27:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-07-09 17:27:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 901. [2021-07-09 17:27:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.1766666666666667) internal successors, (2859), 900 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 2859 transitions. [2021-07-09 17:27:58,644 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 2859 transitions. Word has length 24 [2021-07-09 17:27:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:58,645 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 2859 transitions. [2021-07-09 17:27:58,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 2859 transitions. [2021-07-09 17:27:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:27:58,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:58,646 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:58,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-07-09 17:27:58,847 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1996465444, now seen corresponding path program 73 times [2021-07-09 17:27:58,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:58,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152543031] [2021-07-09 17:27:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:27:59,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152543031] [2021-07-09 17:27:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152543031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625731719] [2021-07-09 17:27:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:59,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:59,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:59,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:59,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:59,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:59,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:59,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:59,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:27:59,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:59,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:27:59,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,623 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2021-07-09 17:27:59,623 INFO L628 ElimStorePlain]: treesize reduction 188, result has 54.3 percent of original size [2021-07-09 17:27:59,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:59,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:27:59,738 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:59,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:27:59,833 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:27:59,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:59,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:00,016 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:00,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:28:00,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-07-09 17:28:00,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:00,193 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:425, output treesize:111 [2021-07-09 17:28:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:00,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625731719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:00,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:00,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:00,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415740570] [2021-07-09 17:28:00,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:00,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:00,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:00,350 INFO L87 Difference]: Start difference. First operand 901 states and 2859 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:00,845 INFO L93 Difference]: Finished difference Result 1151 states and 3526 transitions. [2021-07-09 17:28:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:28:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:00,847 INFO L225 Difference]: With dead ends: 1151 [2021-07-09 17:28:00,847 INFO L226 Difference]: Without dead ends: 1055 [2021-07-09 17:28:00,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-07-09 17:28:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 924. [2021-07-09 17:28:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 3.180931744312026) internal successors, (2936), 923 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2936 transitions. [2021-07-09 17:28:00,858 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2936 transitions. Word has length 24 [2021-07-09 17:28:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:00,858 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 2936 transitions. [2021-07-09 17:28:00,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2936 transitions. [2021-07-09 17:28:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:00,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:00,860 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:01,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:01,063 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:01,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1116191908, now seen corresponding path program 74 times [2021-07-09 17:28:01,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:01,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685127985] [2021-07-09 17:28:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:01,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:01,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685127985] [2021-07-09 17:28:01,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685127985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:01,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759391563] [2021-07-09 17:28:01,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:01,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:01,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:01,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:01,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:01,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:01,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:01,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:01,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:01,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:01,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:28:01,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:01,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:01,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:01,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:01,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:01,772 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:01,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:01,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:01,841 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:01,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:01,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:01,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:01,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:01,971 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:02,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:02,033 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:02,092 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:02,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:02,147 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:81 [2021-07-09 17:28:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:02,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759391563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:02,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:02,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:28:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967941679] [2021-07-09 17:28:02,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:02,265 INFO L87 Difference]: Start difference. First operand 924 states and 2936 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:02,545 INFO L93 Difference]: Finished difference Result 1063 states and 3294 transitions. [2021-07-09 17:28:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:02,547 INFO L225 Difference]: With dead ends: 1063 [2021-07-09 17:28:02,548 INFO L226 Difference]: Without dead ends: 1044 [2021-07-09 17:28:02,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-07-09 17:28:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 918. [2021-07-09 17:28:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.169029443838604) internal successors, (2906), 917 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2906 transitions. [2021-07-09 17:28:02,559 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2906 transitions. Word has length 24 [2021-07-09 17:28:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:02,559 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 2906 transitions. [2021-07-09 17:28:02,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2906 transitions. [2021-07-09 17:28:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:02,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:02,561 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:02,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-09 17:28:02,761 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1464730482, now seen corresponding path program 75 times [2021-07-09 17:28:02,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:02,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681438880] [2021-07-09 17:28:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:02,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:02,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681438880] [2021-07-09 17:28:02,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681438880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:02,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730218893] [2021-07-09 17:28:02,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:03,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:03,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:03,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:03,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:03,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:03,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:03,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:03,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:03,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:28:03,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:03,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:03,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:03,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:03,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:03,329 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:03,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:03,333 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:03,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:03,367 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-07-09 17:28:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:03,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730218893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:03,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:03,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:03,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565719889] [2021-07-09 17:28:03,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:03,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:03,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:03,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:03,448 INFO L87 Difference]: Start difference. First operand 918 states and 2906 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:03,943 INFO L93 Difference]: Finished difference Result 994 states and 3105 transitions. [2021-07-09 17:28:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:03,945 INFO L225 Difference]: With dead ends: 994 [2021-07-09 17:28:03,945 INFO L226 Difference]: Without dead ends: 955 [2021-07-09 17:28:03,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 574.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-09 17:28:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 921. [2021-07-09 17:28:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.1695652173913045) internal successors, (2916), 920 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2916 transitions. [2021-07-09 17:28:03,955 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2916 transitions. Word has length 24 [2021-07-09 17:28:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:03,956 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2916 transitions. [2021-07-09 17:28:03,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2916 transitions. [2021-07-09 17:28:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:03,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:03,957 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:04,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:04,158 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash 861906348, now seen corresponding path program 76 times [2021-07-09 17:28:04,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:04,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627383654] [2021-07-09 17:28:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:04,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:04,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627383654] [2021-07-09 17:28:04,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627383654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:04,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945592107] [2021-07-09 17:28:04,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:04,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:04,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:04,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:04,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:04,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:04,640 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:28:04,772 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-07-09 17:28:04,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:04,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:04,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:04,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:04,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:04,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:04,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:04,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:05,014 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-07-09 17:28:05,015 INFO L628 ElimStorePlain]: treesize reduction 173, result has 54.0 percent of original size [2021-07-09 17:28:05,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:05,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:05,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:05,020 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:05,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:05,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:05,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:05,025 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:05,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:05,030 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:05,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:05,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:05,112 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:108 [2021-07-09 17:28:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:05,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945592107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:05,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:05,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:05,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392519613] [2021-07-09 17:28:05,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:05,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:05,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:05,271 INFO L87 Difference]: Start difference. First operand 921 states and 2916 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,539 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-07-09 17:28:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:05,958 INFO L93 Difference]: Finished difference Result 1161 states and 3560 transitions. [2021-07-09 17:28:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:28:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:05,960 INFO L225 Difference]: With dead ends: 1161 [2021-07-09 17:28:05,960 INFO L226 Difference]: Without dead ends: 1065 [2021-07-09 17:28:05,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:28:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-07-09 17:28:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 930. [2021-07-09 17:28:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.1819160387513454) internal successors, (2956), 929 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2956 transitions. [2021-07-09 17:28:05,971 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2956 transitions. Word has length 24 [2021-07-09 17:28:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:05,971 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 2956 transitions. [2021-07-09 17:28:05,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2956 transitions. [2021-07-09 17:28:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:05,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:05,973 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:06,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:06,173 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash -18367188, now seen corresponding path program 77 times [2021-07-09 17:28:06,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:06,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780074235] [2021-07-09 17:28:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:06,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:06,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780074235] [2021-07-09 17:28:06,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780074235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:06,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774281831] [2021-07-09 17:28:06,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:06,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:06,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:06,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:06,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:06,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:06,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:06,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:28:06,612 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:28:06,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:06,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:06,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:06,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:06,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:06,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:06,700 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:06,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:06,705 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:06,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:06,710 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:06,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:06,714 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:06,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:06,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:06,781 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-07-09 17:28:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:06,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774281831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:06,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:06,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:06,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327902844] [2021-07-09 17:28:06,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:06,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:06,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:06,908 INFO L87 Difference]: Start difference. First operand 930 states and 2956 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:07,581 INFO L93 Difference]: Finished difference Result 1291 states and 3917 transitions. [2021-07-09 17:28:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:28:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:07,587 INFO L225 Difference]: With dead ends: 1291 [2021-07-09 17:28:07,588 INFO L226 Difference]: Without dead ends: 1195 [2021-07-09 17:28:07,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 652.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-07-09 17:28:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 921. [2021-07-09 17:28:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.175) internal successors, (2921), 920 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2921 transitions. [2021-07-09 17:28:07,600 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2921 transitions. Word has length 24 [2021-07-09 17:28:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:07,600 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2921 transitions. [2021-07-09 17:28:07,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2921 transitions. [2021-07-09 17:28:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:07,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:07,602 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:07,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-09 17:28:07,805 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2121799196, now seen corresponding path program 78 times [2021-07-09 17:28:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:07,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339433441] [2021-07-09 17:28:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:07,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:07,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339433441] [2021-07-09 17:28:07,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339433441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:07,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182641098] [2021-07-09 17:28:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:07,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:07,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:07,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:07,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:07,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:07,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:08,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-07-09 17:28:08,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:08,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:08,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,122 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:28:08,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:08,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-07-09 17:28:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182641098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:08,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:08,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:28:08,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485673236] [2021-07-09 17:28:08,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:08,174 INFO L87 Difference]: Start difference. First operand 921 states and 2921 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:08,544 INFO L93 Difference]: Finished difference Result 1291 states and 4007 transitions. [2021-07-09 17:28:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:08,546 INFO L225 Difference]: With dead ends: 1291 [2021-07-09 17:28:08,546 INFO L226 Difference]: Without dead ends: 1260 [2021-07-09 17:28:08,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-07-09 17:28:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 941. [2021-07-09 17:28:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.175531914893617) internal successors, (2985), 940 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2985 transitions. [2021-07-09 17:28:08,559 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2985 transitions. Word has length 24 [2021-07-09 17:28:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:08,559 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2985 transitions. [2021-07-09 17:28:08,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2985 transitions. [2021-07-09 17:28:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:08,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:08,561 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:08,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-09 17:28:08,765 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash 19538978, now seen corresponding path program 79 times [2021-07-09 17:28:08,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:08,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777853970] [2021-07-09 17:28:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:08,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:08,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777853970] [2021-07-09 17:28:08,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777853970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:08,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675468530] [2021-07-09 17:28:08,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:08,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:08,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:08,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:08,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:08,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:08,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:28:09,189 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:28:09,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:09,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:09,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:09,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:09,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:09,201 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:09,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:09,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:09,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-07-09 17:28:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:09,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675468530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:09,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:09,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:09,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683675853] [2021-07-09 17:28:09,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:09,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:09,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:09,241 INFO L87 Difference]: Start difference. First operand 941 states and 2985 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:09,973 INFO L93 Difference]: Finished difference Result 1307 states and 4009 transitions. [2021-07-09 17:28:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:09,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:09,975 INFO L225 Difference]: With dead ends: 1307 [2021-07-09 17:28:09,975 INFO L226 Difference]: Without dead ends: 1249 [2021-07-09 17:28:09,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:28:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-07-09 17:28:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 956. [2021-07-09 17:28:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 3.175916230366492) internal successors, (3033), 955 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 3033 transitions. [2021-07-09 17:28:09,988 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 3033 transitions. Word has length 24 [2021-07-09 17:28:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:09,988 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 3033 transitions. [2021-07-09 17:28:09,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 3033 transitions. [2021-07-09 17:28:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:09,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:09,989 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:10,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable575,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,191 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:10,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1718432838, now seen corresponding path program 80 times [2021-07-09 17:28:10,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:10,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151496022] [2021-07-09 17:28:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:10,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:10,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151496022] [2021-07-09 17:28:10,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151496022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596656518] [2021-07-09 17:28:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:10,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:10,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:10,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:10,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:10,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:10,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:10,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:10,501 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:28:10,674 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_314], 1=[o_4, v_prenex_315]} [2021-07-09 17:28:10,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:10,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:10,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,761 INFO L628 ElimStorePlain]: treesize reduction 52, result has 65.1 percent of original size [2021-07-09 17:28:10,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:10,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:28:10,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:10,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:10,808 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:10,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:10,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:10,845 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:10,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:10,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:28:10,884 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:28:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:10,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596656518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:10,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:10,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399422976] [2021-07-09 17:28:10,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:10,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:10,963 INFO L87 Difference]: Start difference. First operand 956 states and 3033 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:11,841 INFO L93 Difference]: Finished difference Result 1357 states and 4051 transitions. [2021-07-09 17:28:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:11,843 INFO L225 Difference]: With dead ends: 1357 [2021-07-09 17:28:11,844 INFO L226 Difference]: Without dead ends: 1281 [2021-07-09 17:28:11,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 950.6ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:28:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-07-09 17:28:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 964. [2021-07-09 17:28:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.1723779854620977) internal successors, (3055), 963 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3055 transitions. [2021-07-09 17:28:11,857 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3055 transitions. Word has length 24 [2021-07-09 17:28:11,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:11,857 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 3055 transitions. [2021-07-09 17:28:11,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3055 transitions. [2021-07-09 17:28:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:11,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:11,859 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:12,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:12,059 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:12,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1418044830, now seen corresponding path program 81 times [2021-07-09 17:28:12,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:12,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982959745] [2021-07-09 17:28:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:12,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:12,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982959745] [2021-07-09 17:28:12,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982959745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:12,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068310872] [2021-07-09 17:28:12,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:12,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:12,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:12,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:12,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:12,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:12,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:12,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:12,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:28:12,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:12,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:12,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,493 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:28:12,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:12,494 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-07-09 17:28:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:12,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068310872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:12,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:12,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 17:28:12,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276261667] [2021-07-09 17:28:12,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:12,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:12,525 INFO L87 Difference]: Start difference. First operand 964 states and 3055 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:12,912 INFO L93 Difference]: Finished difference Result 1719 states and 5094 transitions. [2021-07-09 17:28:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:28:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:12,916 INFO L225 Difference]: With dead ends: 1719 [2021-07-09 17:28:12,916 INFO L226 Difference]: Without dead ends: 1661 [2021-07-09 17:28:12,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-07-09 17:28:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 971. [2021-07-09 17:28:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.1783505154639173) internal successors, (3083), 970 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3083 transitions. [2021-07-09 17:28:12,935 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3083 transitions. Word has length 24 [2021-07-09 17:28:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:12,935 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 3083 transitions. [2021-07-09 17:28:12,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3083 transitions. [2021-07-09 17:28:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:12,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:12,936 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:13,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:13,137 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1313623516, now seen corresponding path program 82 times [2021-07-09 17:28:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:13,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392000845] [2021-07-09 17:28:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:13,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:13,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392000845] [2021-07-09 17:28:13,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392000845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:13,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211619908] [2021-07-09 17:28:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:13,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:13,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:13,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:13,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:13,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:13,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:13,394 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:28:13,609 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:28:13,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:13,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:28:13,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,626 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:11 [2021-07-09 17:28:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211619908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:13,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:13,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:13,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918265657] [2021-07-09 17:28:13,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:13,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:13,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:13,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:13,669 INFO L87 Difference]: Start difference. First operand 971 states and 3083 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:14,275 INFO L93 Difference]: Finished difference Result 1677 states and 5067 transitions. [2021-07-09 17:28:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:28:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:14,278 INFO L225 Difference]: With dead ends: 1677 [2021-07-09 17:28:14,278 INFO L226 Difference]: Without dead ends: 1573 [2021-07-09 17:28:14,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 580.6ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-07-09 17:28:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 990. [2021-07-09 17:28:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 3.1941354903943378) internal successors, (3159), 989 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 3159 transitions. [2021-07-09 17:28:14,293 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 3159 transitions. Word has length 24 [2021-07-09 17:28:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:14,293 INFO L482 AbstractCegarLoop]: Abstraction has 990 states and 3159 transitions. [2021-07-09 17:28:14,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 3159 transitions. [2021-07-09 17:28:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:14,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:14,294 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:14,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-09 17:28:14,495 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1225105820, now seen corresponding path program 83 times [2021-07-09 17:28:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:14,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119930319] [2021-07-09 17:28:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:14,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:14,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119930319] [2021-07-09 17:28:14,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119930319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:14,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996819881] [2021-07-09 17:28:14,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:14,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:14,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:14,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:14,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:14,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:14,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:14,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:14,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:14,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:14,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:14,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:14,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:14,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:14,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:14,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:14,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:28:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:15,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:15,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:15,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:15,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:15,194 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:15,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:15,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:28:15,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:15,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:15,236 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-07-09 17:28:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:15,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996819881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:15,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:15,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:15,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44859734] [2021-07-09 17:28:15,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:15,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:15,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:15,306 INFO L87 Difference]: Start difference. First operand 990 states and 3159 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:15,633 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-07-09 17:28:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:16,242 INFO L93 Difference]: Finished difference Result 1505 states and 4594 transitions. [2021-07-09 17:28:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:28:16,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:16,245 INFO L225 Difference]: With dead ends: 1505 [2021-07-09 17:28:16,245 INFO L226 Difference]: Without dead ends: 1439 [2021-07-09 17:28:16,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 947.3ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-07-09 17:28:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 981. [2021-07-09 17:28:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.201020408163265) internal successors, (3137), 980 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3137 transitions. [2021-07-09 17:28:16,258 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3137 transitions. Word has length 24 [2021-07-09 17:28:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:16,259 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3137 transitions. [2021-07-09 17:28:16,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3137 transitions. [2021-07-09 17:28:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:16,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:16,260 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:16,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-07-09 17:28:16,463 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash 731352034, now seen corresponding path program 84 times [2021-07-09 17:28:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:16,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228586641] [2021-07-09 17:28:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:16,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:16,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228586641] [2021-07-09 17:28:16,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228586641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:16,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960728079] [2021-07-09 17:28:16,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:16,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:16,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:16,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:16,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:16,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:16,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:16,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:28:17,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:17,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:17,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:17,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:17,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:17,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:17,120 INFO L628 ElimStorePlain]: treesize reduction 50, result has 36.7 percent of original size [2021-07-09 17:28:17,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:17,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:17,123 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:17,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:17,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:17,132 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-07-09 17:28:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:17,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960728079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:17,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:17,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:17,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179289927] [2021-07-09 17:28:17,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:17,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:17,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:17,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:17,179 INFO L87 Difference]: Start difference. First operand 981 states and 3137 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:17,913 INFO L93 Difference]: Finished difference Result 1458 states and 4473 transitions. [2021-07-09 17:28:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:17,915 INFO L225 Difference]: With dead ends: 1458 [2021-07-09 17:28:17,915 INFO L226 Difference]: Without dead ends: 1344 [2021-07-09 17:28:17,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 708.3ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-09 17:28:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 981. [2021-07-09 17:28:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.201020408163265) internal successors, (3137), 980 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3137 transitions. [2021-07-09 17:28:17,928 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3137 transitions. Word has length 24 [2021-07-09 17:28:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:17,928 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3137 transitions. [2021-07-09 17:28:17,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3137 transitions. [2021-07-09 17:28:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:17,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:17,930 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:18,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-07-09 17:28:18,130 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2045366020, now seen corresponding path program 85 times [2021-07-09 17:28:18,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:18,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303505644] [2021-07-09 17:28:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:18,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303505644] [2021-07-09 17:28:18,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303505644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691234414] [2021-07-09 17:28:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:18,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:18,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:18,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:18,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:18,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:18,470 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:28:18,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:18,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:18,752 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:18,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:18,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:18,890 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:18,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:18,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:19,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:19,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:19,012 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:19,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:19,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:19,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:19,069 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:19,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:19,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:19,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:19,123 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:19,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:19,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:19,172 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-07-09 17:28:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:19,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691234414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:19,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:19,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263026004] [2021-07-09 17:28:19,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:19,304 INFO L87 Difference]: Start difference. First operand 981 states and 3137 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:19,662 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-07-09 17:28:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:20,293 INFO L93 Difference]: Finished difference Result 1461 states and 4429 transitions. [2021-07-09 17:28:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:28:20,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:20,296 INFO L225 Difference]: With dead ends: 1461 [2021-07-09 17:28:20,296 INFO L226 Difference]: Without dead ends: 1387 [2021-07-09 17:28:20,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1030.0ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:28:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-07-09 17:28:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 993. [2021-07-09 17:28:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.2076612903225805) internal successors, (3182), 992 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3182 transitions. [2021-07-09 17:28:20,311 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3182 transitions. Word has length 24 [2021-07-09 17:28:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:20,311 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3182 transitions. [2021-07-09 17:28:20,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3182 transitions. [2021-07-09 17:28:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:20,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:20,313 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:20,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:20,514 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash -125536922, now seen corresponding path program 86 times [2021-07-09 17:28:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:20,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361152580] [2021-07-09 17:28:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:20,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:20,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361152580] [2021-07-09 17:28:20,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361152580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:20,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305563201] [2021-07-09 17:28:20,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:20,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:20,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:20,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:20,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:20,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:20,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:20,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:20,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:20,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-07-09 17:28:20,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:20,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:20,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:20,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:20,996 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:21,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:21,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:21,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:21,047 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:21,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:21,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:21,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:25 [2021-07-09 17:28:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:21,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305563201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:21,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:21,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:21,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748489164] [2021-07-09 17:28:21,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:21,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:21,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:21,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:21,167 INFO L87 Difference]: Start difference. First operand 993 states and 3182 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:22,260 INFO L93 Difference]: Finished difference Result 1525 states and 4648 transitions. [2021-07-09 17:28:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:22,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:22,263 INFO L225 Difference]: With dead ends: 1525 [2021-07-09 17:28:22,263 INFO L226 Difference]: Without dead ends: 1487 [2021-07-09 17:28:22,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1031.0ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-07-09 17:28:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 998. [2021-07-09 17:28:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2156469408224675) internal successors, (3206), 997 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3206 transitions. [2021-07-09 17:28:22,278 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3206 transitions. Word has length 24 [2021-07-09 17:28:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:22,278 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 3206 transitions. [2021-07-09 17:28:22,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3206 transitions. [2021-07-09 17:28:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:22,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:22,279 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:22,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-07-09 17:28:22,481 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1253735250, now seen corresponding path program 87 times [2021-07-09 17:28:22,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:22,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244734295] [2021-07-09 17:28:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:22,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:22,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244734295] [2021-07-09 17:28:22,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244734295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:22,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945395988] [2021-07-09 17:28:22,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:22,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:28:22,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:22,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:22,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:22,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:22,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:28:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:22,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:22,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,783 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:28:22,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:22,784 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-07-09 17:28:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:22,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945395988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:22,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:22,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 17:28:22,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376389546] [2021-07-09 17:28:22,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:28:22,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:22,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:28:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:28:22,817 INFO L87 Difference]: Start difference. First operand 998 states and 3206 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:23,074 INFO L93 Difference]: Finished difference Result 1271 states and 3948 transitions. [2021-07-09 17:28:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:23,077 INFO L225 Difference]: With dead ends: 1271 [2021-07-09 17:28:23,077 INFO L226 Difference]: Without dead ends: 1240 [2021-07-09 17:28:23,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-07-09 17:28:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 996. [2021-07-09 17:28:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.2190954773869347) internal successors, (3203), 995 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3203 transitions. [2021-07-09 17:28:23,090 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3203 transitions. Word has length 24 [2021-07-09 17:28:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:23,090 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3203 transitions. [2021-07-09 17:28:23,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3203 transitions. [2021-07-09 17:28:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:23,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:23,092 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:23,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-07-09 17:28:23,301 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1623574386, now seen corresponding path program 88 times [2021-07-09 17:28:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:23,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987452716] [2021-07-09 17:28:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:23,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987452716] [2021-07-09 17:28:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987452716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758877644] [2021-07-09 17:28:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:23,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:23,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:23,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:23,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:23,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:23,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:23,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:23,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:28:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:23,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:23,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:23,628 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:28:23,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:23,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-07-09 17:28:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758877644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:23,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:23,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:28:23,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348749209] [2021-07-09 17:28:23,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:23,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:23,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:23,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:23,683 INFO L87 Difference]: Start difference. First operand 996 states and 3203 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:23,960 INFO L93 Difference]: Finished difference Result 1269 states and 3936 transitions. [2021-07-09 17:28:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:23,962 INFO L225 Difference]: With dead ends: 1269 [2021-07-09 17:28:23,962 INFO L226 Difference]: Without dead ends: 1219 [2021-07-09 17:28:23,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-07-09 17:28:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 955. [2021-07-09 17:28:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.1949685534591197) internal successors, (3048), 954 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3048 transitions. [2021-07-09 17:28:23,975 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3048 transitions. Word has length 24 [2021-07-09 17:28:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:23,975 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3048 transitions. [2021-07-09 17:28:23,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3048 transitions. [2021-07-09 17:28:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:23,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:23,976 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:24,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:24,177 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash 242494626, now seen corresponding path program 89 times [2021-07-09 17:28:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:24,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713736611] [2021-07-09 17:28:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:24,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:24,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713736611] [2021-07-09 17:28:24,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713736611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:24,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796383670] [2021-07-09 17:28:24,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:24,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:24,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:24,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:24,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:24,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:24,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:27 [2021-07-09 17:28:24,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:24,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:24,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:24,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:24,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:24,475 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:28:24,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:24,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-07-09 17:28:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:24,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796383670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:24,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:24,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:28:24,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420106222] [2021-07-09 17:28:24,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:24,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:24,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:24,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:24,524 INFO L87 Difference]: Start difference. First operand 955 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:24,797 INFO L93 Difference]: Finished difference Result 1087 states and 3424 transitions. [2021-07-09 17:28:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:28:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:24,799 INFO L225 Difference]: With dead ends: 1087 [2021-07-09 17:28:24,800 INFO L226 Difference]: Without dead ends: 1028 [2021-07-09 17:28:24,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-07-09 17:28:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 969. [2021-07-09 17:28:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.1921487603305785) internal successors, (3090), 968 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3090 transitions. [2021-07-09 17:28:24,811 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3090 transitions. Word has length 24 [2021-07-09 17:28:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:24,811 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3090 transitions. [2021-07-09 17:28:24,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3090 transitions. [2021-07-09 17:28:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:24,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:24,812 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:25,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:25,013 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:25,013 INFO L82 PathProgramCache]: Analyzing trace with hash -22923196, now seen corresponding path program 90 times [2021-07-09 17:28:25,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:25,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453330220] [2021-07-09 17:28:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:25,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:25,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453330220] [2021-07-09 17:28:25,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453330220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:25,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126293568] [2021-07-09 17:28:25,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:25,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:25,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:25,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:25,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:25,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:28:25,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:25,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,392 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:28:25,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:25,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,413 INFO L518 ElimStorePlain]: Eliminatee v_prenex_353 vanished before elimination [2021-07-09 17:28:25,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:25,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:28:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:25,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126293568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:25,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:25,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:28:25,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727269559] [2021-07-09 17:28:25,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:25,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:25,487 INFO L87 Difference]: Start difference. First operand 969 states and 3090 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:25,894 INFO L93 Difference]: Finished difference Result 1173 states and 3639 transitions. [2021-07-09 17:28:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:25,897 INFO L225 Difference]: With dead ends: 1173 [2021-07-09 17:28:25,897 INFO L226 Difference]: Without dead ends: 1096 [2021-07-09 17:28:25,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-07-09 17:28:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 962. [2021-07-09 17:28:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 3.193548387096774) internal successors, (3069), 961 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 3069 transitions. [2021-07-09 17:28:25,909 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 3069 transitions. Word has length 24 [2021-07-09 17:28:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:25,909 INFO L482 AbstractCegarLoop]: Abstraction has 962 states and 3069 transitions. [2021-07-09 17:28:25,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 3069 transitions. [2021-07-09 17:28:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:25,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:25,911 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:26,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:26,111 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:26,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2123247564, now seen corresponding path program 91 times [2021-07-09 17:28:26,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:26,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168512383] [2021-07-09 17:28:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:26,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168512383] [2021-07-09 17:28:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168512383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833152620] [2021-07-09 17:28:26,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:26,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:26,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:26,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:28:26,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:26,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:26,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:26,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:28:26,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:26,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:26,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:26,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:26,501 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-07-09 17:28:26,501 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:28:26,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:26,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:26,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:26,525 INFO L518 ElimStorePlain]: Eliminatee v_prenex_355 vanished before elimination [2021-07-09 17:28:26,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:26,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-07-09 17:28:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:26,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833152620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:26,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:26,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:28:26,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556899728] [2021-07-09 17:28:26,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:26,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:26,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:26,608 INFO L87 Difference]: Start difference. First operand 962 states and 3069 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:27,050 INFO L93 Difference]: Finished difference Result 1240 states and 3860 transitions. [2021-07-09 17:28:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:28:27,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:27,052 INFO L225 Difference]: With dead ends: 1240 [2021-07-09 17:28:27,052 INFO L226 Difference]: Without dead ends: 1149 [2021-07-09 17:28:27,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-07-09 17:28:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 956. [2021-07-09 17:28:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 3.194764397905759) internal successors, (3051), 955 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 3051 transitions. [2021-07-09 17:28:27,065 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 3051 transitions. Word has length 24 [2021-07-09 17:28:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:27,065 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 3051 transitions. [2021-07-09 17:28:27,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 3051 transitions. [2021-07-09 17:28:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:27,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:27,066 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:27,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-07-09 17:28:27,267 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1830085998, now seen corresponding path program 92 times [2021-07-09 17:28:27,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:27,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812182760] [2021-07-09 17:28:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:27,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:27,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812182760] [2021-07-09 17:28:27,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812182760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:27,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232168] [2021-07-09 17:28:27,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:27,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:27,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:27,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:27,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:27,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:27,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-07-09 17:28:27,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:27,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:27,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:27,817 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:27,820 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:27,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:27,842 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:25 [2021-07-09 17:28:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:27,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:27,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:27,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:27,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756637625] [2021-07-09 17:28:27,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:27,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:27,890 INFO L87 Difference]: Start difference. First operand 956 states and 3051 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:28,640 INFO L93 Difference]: Finished difference Result 1188 states and 3720 transitions. [2021-07-09 17:28:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:28:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:28,642 INFO L225 Difference]: With dead ends: 1188 [2021-07-09 17:28:28,642 INFO L226 Difference]: Without dead ends: 1117 [2021-07-09 17:28:28,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 717.0ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-07-09 17:28:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 973. [2021-07-09 17:28:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 3.205761316872428) internal successors, (3116), 972 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 3116 transitions. [2021-07-09 17:28:28,654 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 3116 transitions. Word has length 24 [2021-07-09 17:28:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:28,654 INFO L482 AbstractCegarLoop]: Abstraction has 973 states and 3116 transitions. [2021-07-09 17:28:28,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 3116 transitions. [2021-07-09 17:28:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:28,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:28,656 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:28,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:28,856 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash 92114182, now seen corresponding path program 93 times [2021-07-09 17:28:28,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:28,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318564678] [2021-07-09 17:28:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:29,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318564678] [2021-07-09 17:28:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318564678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546685454] [2021-07-09 17:28:29,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:29,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:29,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:29,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:29,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:29,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:29,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:29,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:29,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-07-09 17:28:29,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:29,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:29,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:29,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:29,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:29,488 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:29,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:29,492 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:29,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:29,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:29,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:29,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:29,559 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:29,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:29,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:29,614 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:29,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:29,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:29,618 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:29,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:29,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:29,665 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:153, output treesize:57 [2021-07-09 17:28:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:29,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546685454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:29,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144465503] [2021-07-09 17:28:29,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:29,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:29,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:29,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:29,758 INFO L87 Difference]: Start difference. First operand 973 states and 3116 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:30,409 INFO L93 Difference]: Finished difference Result 1269 states and 3885 transitions. [2021-07-09 17:28:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:28:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:30,412 INFO L225 Difference]: With dead ends: 1269 [2021-07-09 17:28:30,412 INFO L226 Difference]: Without dead ends: 1181 [2021-07-09 17:28:30,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 625.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:28:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-09 17:28:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 977. [2021-07-09 17:28:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 3.206967213114754) internal successors, (3130), 976 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 3130 transitions. [2021-07-09 17:28:30,425 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 3130 transitions. Word has length 24 [2021-07-09 17:28:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:30,425 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 3130 transitions. [2021-07-09 17:28:30,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 3130 transitions. [2021-07-09 17:28:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:30,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:30,426 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:30,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2021-07-09 17:28:30,657 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1722226322, now seen corresponding path program 94 times [2021-07-09 17:28:30,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:30,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101555374] [2021-07-09 17:28:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:30,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:30,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101555374] [2021-07-09 17:28:30,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101555374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:30,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130246840] [2021-07-09 17:28:30,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:30,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:30,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:30,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:30,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:30,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:30,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:31,008 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-07-09 17:28:31,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:31,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:31,326 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:31,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:31,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:31,383 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:31,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:31,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:31 [2021-07-09 17:28:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:31,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130246840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:31,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:31,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:28:31,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299455846] [2021-07-09 17:28:31,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:31,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:31,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:31,476 INFO L87 Difference]: Start difference. First operand 977 states and 3130 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:31,961 INFO L93 Difference]: Finished difference Result 1305 states and 4027 transitions. [2021-07-09 17:28:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:31,964 INFO L225 Difference]: With dead ends: 1305 [2021-07-09 17:28:31,964 INFO L226 Difference]: Without dead ends: 1247 [2021-07-09 17:28:31,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-07-09 17:28:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 976. [2021-07-09 17:28:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.206153846153846) internal successors, (3126), 975 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3126 transitions. [2021-07-09 17:28:31,977 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3126 transitions. Word has length 24 [2021-07-09 17:28:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:31,977 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3126 transitions. [2021-07-09 17:28:31,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3126 transitions. [2021-07-09 17:28:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:31,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:31,979 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:32,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:32,179 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:32,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1896118492, now seen corresponding path program 95 times [2021-07-09 17:28:32,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:32,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646205701] [2021-07-09 17:28:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:32,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646205701] [2021-07-09 17:28:32,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646205701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658271118] [2021-07-09 17:28:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:32,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:32,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:32,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:32,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:32,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:32,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:32,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:32,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:32,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:32,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:32,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:32,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:28:32,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:32,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:32,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:32,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:32,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:32,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:32,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:32,919 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:32,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:32,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:32,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:32,988 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:33,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:33,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:33,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:33,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:33,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:33,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:33,126 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:33,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:33,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:33,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:33,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:33,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:33,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:33,249 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:33,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:33,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:33,306 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:69 [2021-07-09 17:28:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:33,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658271118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:33,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:33,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:33,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886741706] [2021-07-09 17:28:33,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:33,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:33,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:33,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:33,424 INFO L87 Difference]: Start difference. First operand 976 states and 3126 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:33,988 INFO L93 Difference]: Finished difference Result 1343 states and 4114 transitions. [2021-07-09 17:28:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:33,990 INFO L225 Difference]: With dead ends: 1343 [2021-07-09 17:28:33,990 INFO L226 Difference]: Without dead ends: 1269 [2021-07-09 17:28:33,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-07-09 17:28:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 981. [2021-07-09 17:28:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.216326530612245) internal successors, (3152), 980 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3152 transitions. [2021-07-09 17:28:34,003 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3152 transitions. Word has length 24 [2021-07-09 17:28:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:34,003 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3152 transitions. [2021-07-09 17:28:34,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3152 transitions. [2021-07-09 17:28:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:34,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:34,005 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:34,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:34,205 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1518575268, now seen corresponding path program 96 times [2021-07-09 17:28:34,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:34,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444211451] [2021-07-09 17:28:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:34,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:34,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444211451] [2021-07-09 17:28:34,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444211451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:34,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465952418] [2021-07-09 17:28:34,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:34,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:28:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:34,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:34,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:34,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:34,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:34,583 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-07-09 17:28:34,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:34,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:34,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:34,727 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:34,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:34,731 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:34,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:34,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:34,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:34,866 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:34,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:34,871 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:34,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:34,926 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:69 [2021-07-09 17:28:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465952418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:35,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:35,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:35,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101079996] [2021-07-09 17:28:35,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:35,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:35,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:35,073 INFO L87 Difference]: Start difference. First operand 981 states and 3152 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:35,681 INFO L93 Difference]: Finished difference Result 1395 states and 4282 transitions. [2021-07-09 17:28:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:35,684 INFO L225 Difference]: With dead ends: 1395 [2021-07-09 17:28:35,684 INFO L226 Difference]: Without dead ends: 1338 [2021-07-09 17:28:35,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:28:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-07-09 17:28:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 981. [2021-07-09 17:28:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.2173469387755103) internal successors, (3153), 980 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3153 transitions. [2021-07-09 17:28:35,698 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3153 transitions. Word has length 24 [2021-07-09 17:28:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:35,698 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3153 transitions. [2021-07-09 17:28:35,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3153 transitions. [2021-07-09 17:28:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:35,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:35,699 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:35,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-07-09 17:28:35,901 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1714438946, now seen corresponding path program 97 times [2021-07-09 17:28:35,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:35,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327760490] [2021-07-09 17:28:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:36,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327760490] [2021-07-09 17:28:36,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327760490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213245426] [2021-07-09 17:28:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:36,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:36,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:36,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:36,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:36,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-07-09 17:28:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:36,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:36,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:36,456 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:36,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:36,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,474 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2021-07-09 17:28:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:36,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213245426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:36,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:36,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140177811] [2021-07-09 17:28:36,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:36,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:36,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:36,516 INFO L87 Difference]: Start difference. First operand 981 states and 3153 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:36,840 INFO L93 Difference]: Finished difference Result 1163 states and 3678 transitions. [2021-07-09 17:28:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:28:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:36,842 INFO L225 Difference]: With dead ends: 1163 [2021-07-09 17:28:36,842 INFO L226 Difference]: Without dead ends: 1144 [2021-07-09 17:28:36,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-07-09 17:28:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 979. [2021-07-09 17:28:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 3.2137014314928427) internal successors, (3143), 978 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3143 transitions. [2021-07-09 17:28:36,855 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3143 transitions. Word has length 24 [2021-07-09 17:28:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:36,855 INFO L482 AbstractCegarLoop]: Abstraction has 979 states and 3143 transitions. [2021-07-09 17:28:36,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3143 transitions. [2021-07-09 17:28:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:36,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:36,857 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:37,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-07-09 17:28:37,057 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1454999516, now seen corresponding path program 98 times [2021-07-09 17:28:37,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:37,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629440743] [2021-07-09 17:28:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:37,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:37,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629440743] [2021-07-09 17:28:37,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629440743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594869385] [2021-07-09 17:28:37,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:37,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:37,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:37,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:37,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:37,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:37,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:37,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:27 [2021-07-09 17:28:37,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:37,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:37,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:37,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:37,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:37,469 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:37,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:37,472 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:37,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:37,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-07-09 17:28:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:37,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594869385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:37,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:37,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636405271] [2021-07-09 17:28:37,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:37,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:37,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:37,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:37,580 INFO L87 Difference]: Start difference. First operand 979 states and 3143 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:37,984 INFO L93 Difference]: Finished difference Result 1210 states and 3815 transitions. [2021-07-09 17:28:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:28:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:37,987 INFO L225 Difference]: With dead ends: 1210 [2021-07-09 17:28:37,987 INFO L226 Difference]: Without dead ends: 1169 [2021-07-09 17:28:37,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:28:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-07-09 17:28:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 981. [2021-07-09 17:28:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.1989795918367347) internal successors, (3135), 980 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3135 transitions. [2021-07-09 17:28:37,999 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3135 transitions. Word has length 24 [2021-07-09 17:28:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:38,000 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3135 transitions. [2021-07-09 17:28:38,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3135 transitions. [2021-07-09 17:28:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:38,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:38,001 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:38,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:38,202 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1392763898, now seen corresponding path program 99 times [2021-07-09 17:28:38,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:38,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789673278] [2021-07-09 17:28:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:38,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:38,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789673278] [2021-07-09 17:28:38,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789673278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:38,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140921823] [2021-07-09 17:28:38,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:38,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:38,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:38,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:38,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:38,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:38,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:38,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:38,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:38,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:28:38,618 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:28:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:38,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:38,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:38,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:38,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:38,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:38,655 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:38,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:38,659 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:38,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:38,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:38,683 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-07-09 17:28:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:38,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140921823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:38,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:38,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:38,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300908466] [2021-07-09 17:28:38,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:38,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:38,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:38,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:38,766 INFO L87 Difference]: Start difference. First operand 981 states and 3135 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:39,168 INFO L93 Difference]: Finished difference Result 1216 states and 3797 transitions. [2021-07-09 17:28:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:39,171 INFO L225 Difference]: With dead ends: 1216 [2021-07-09 17:28:39,171 INFO L226 Difference]: Without dead ends: 1154 [2021-07-09 17:28:39,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-07-09 17:28:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 981. [2021-07-09 17:28:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.1989795918367347) internal successors, (3135), 980 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3135 transitions. [2021-07-09 17:28:39,183 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3135 transitions. Word has length 24 [2021-07-09 17:28:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:39,184 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3135 transitions. [2021-07-09 17:28:39,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3135 transitions. [2021-07-09 17:28:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:39,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:39,185 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:39,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-07-09 17:28:39,386 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:39,386 INFO L82 PathProgramCache]: Analyzing trace with hash -761559396, now seen corresponding path program 100 times [2021-07-09 17:28:39,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:39,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327080876] [2021-07-09 17:28:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:39,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:39,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327080876] [2021-07-09 17:28:39,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327080876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:39,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155464164] [2021-07-09 17:28:39,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:39,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:39,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:39,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:39,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:39,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:39,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:39,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:39,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:39,783 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:28:39,888 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:28:39,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:39,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:39,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:39,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:39,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:39,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:39,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:39,922 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:39,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:40,105 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 17:28:40,105 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-07-09 17:28:40,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:40,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:40,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:40,111 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:40,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:40,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:40,116 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:40,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:40,121 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:40,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:40,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:40,193 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-07-09 17:28:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155464164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:40,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:40,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64702769] [2021-07-09 17:28:40,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:40,346 INFO L87 Difference]: Start difference. First operand 981 states and 3135 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,591 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:28:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:40,966 INFO L93 Difference]: Finished difference Result 1446 states and 4471 transitions. [2021-07-09 17:28:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:40,969 INFO L225 Difference]: With dead ends: 1446 [2021-07-09 17:28:40,969 INFO L226 Difference]: Without dead ends: 1366 [2021-07-09 17:28:40,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 700.5ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-07-09 17:28:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 995. [2021-07-09 17:28:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.211267605633803) internal successors, (3192), 994 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3192 transitions. [2021-07-09 17:28:40,984 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3192 transitions. Word has length 24 [2021-07-09 17:28:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:40,984 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 3192 transitions. [2021-07-09 17:28:40,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3192 transitions. [2021-07-09 17:28:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:40,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:40,985 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:41,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:41,186 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1189527654, now seen corresponding path program 101 times [2021-07-09 17:28:41,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:41,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722107841] [2021-07-09 17:28:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:41,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:41,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722107841] [2021-07-09 17:28:41,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722107841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:41,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047138332] [2021-07-09 17:28:41,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:41,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:41,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:41,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:41,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:41,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:41,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:41,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:41,589 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:28:41,681 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:28:41,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:41,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:41,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:41,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:41,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:41,707 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:41,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:41,716 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:41,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,877 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-07-09 17:28:41,877 INFO L628 ElimStorePlain]: treesize reduction 144, result has 51.5 percent of original size [2021-07-09 17:28:41,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:41,883 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:41,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:41,887 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:41,892 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:41,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:41,954 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:345, output treesize:81 [2021-07-09 17:28:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:42,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047138332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:42,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:42,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368750661] [2021-07-09 17:28:42,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:42,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:42,083 INFO L87 Difference]: Start difference. First operand 995 states and 3192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,359 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:28:42,547 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-09 17:28:42,719 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-07-09 17:28:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:43,002 INFO L93 Difference]: Finished difference Result 1372 states and 4197 transitions. [2021-07-09 17:28:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:43,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:43,004 INFO L225 Difference]: With dead ends: 1372 [2021-07-09 17:28:43,004 INFO L226 Difference]: Without dead ends: 1287 [2021-07-09 17:28:43,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 928.0ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-09 17:28:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 998. [2021-07-09 17:28:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2076228686058172) internal successors, (3198), 997 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3198 transitions. [2021-07-09 17:28:43,017 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3198 transitions. Word has length 24 [2021-07-09 17:28:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:43,017 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 3198 transitions. [2021-07-09 17:28:43,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3198 transitions. [2021-07-09 17:28:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:43,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:43,019 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:43,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-07-09 17:28:43,220 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -819865060, now seen corresponding path program 102 times [2021-07-09 17:28:43,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:43,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62569339] [2021-07-09 17:28:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:43,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62569339] [2021-07-09 17:28:43,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62569339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490006516] [2021-07-09 17:28:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:43,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:43,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:43,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:43,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:43,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:43,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:43,679 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:28:43,840 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:28:43,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:43,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:43,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:43,877 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:43,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:43,880 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:43,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:43,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-07-09 17:28:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:43,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490006516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:43,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:43,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467342981] [2021-07-09 17:28:43,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:43,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:43,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:43,990 INFO L87 Difference]: Start difference. First operand 998 states and 3198 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,257 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:28:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:44,701 INFO L93 Difference]: Finished difference Result 1277 states and 3985 transitions. [2021-07-09 17:28:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:28:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:44,703 INFO L225 Difference]: With dead ends: 1277 [2021-07-09 17:28:44,704 INFO L226 Difference]: Without dead ends: 1227 [2021-07-09 17:28:44,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 810.5ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-09 17:28:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 989. [2021-07-09 17:28:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 3.195344129554656) internal successors, (3157), 988 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 3157 transitions. [2021-07-09 17:28:44,717 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 3157 transitions. Word has length 24 [2021-07-09 17:28:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:44,717 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 3157 transitions. [2021-07-09 17:28:44,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 3157 transitions. [2021-07-09 17:28:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:44,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:44,718 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:44,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable764,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:44,919 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1346148980, now seen corresponding path program 103 times [2021-07-09 17:28:44,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:44,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543066996] [2021-07-09 17:28:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:45,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:45,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543066996] [2021-07-09 17:28:45,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543066996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:45,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521688215] [2021-07-09 17:28:45,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:45,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:45,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:45,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:45,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:45,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:45,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:45,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:45,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:28:45,499 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:28:45,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:45,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:45,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:45,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:45,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,600 INFO L628 ElimStorePlain]: treesize reduction 55, result has 64.1 percent of original size [2021-07-09 17:28:45,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:45,605 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:45,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:45,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:45,610 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:45,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:45,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:28:45,648 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:177, output treesize:47 [2021-07-09 17:28:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:45,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521688215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:45,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:45,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:45,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034304084] [2021-07-09 17:28:45,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:45,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:45,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:45,732 INFO L87 Difference]: Start difference. First operand 989 states and 3157 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:45,986 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:28:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:46,405 INFO L93 Difference]: Finished difference Result 1155 states and 3607 transitions. [2021-07-09 17:28:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:46,407 INFO L225 Difference]: With dead ends: 1155 [2021-07-09 17:28:46,407 INFO L226 Difference]: Without dead ends: 1109 [2021-07-09 17:28:46,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 756.0ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-07-09 17:28:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 987. [2021-07-09 17:28:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.1967545638945234) internal successors, (3152), 986 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3152 transitions. [2021-07-09 17:28:46,419 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3152 transitions. Word has length 24 [2021-07-09 17:28:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:46,419 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3152 transitions. [2021-07-09 17:28:46,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3152 transitions. [2021-07-09 17:28:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:46,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:46,420 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:46,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-09 17:28:46,621 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1553402530, now seen corresponding path program 104 times [2021-07-09 17:28:46,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:46,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534732951] [2021-07-09 17:28:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:46,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:46,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534732951] [2021-07-09 17:28:46,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534732951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:46,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901342252] [2021-07-09 17:28:46,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:46,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:46,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:46,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:46,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:46,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:46,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:28:46,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:46,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:46,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:46,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:46,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:46,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:46,958 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:67 [2021-07-09 17:28:47,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:47,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:47,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:47,084 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:47,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:47,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-07-09 17:28:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:47,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901342252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:47,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:47,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:47,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263422835] [2021-07-09 17:28:47,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:47,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:47,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:47,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:47,129 INFO L87 Difference]: Start difference. First operand 987 states and 3152 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:47,355 INFO L93 Difference]: Finished difference Result 1056 states and 3325 transitions. [2021-07-09 17:28:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:47,356 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:47,357 INFO L225 Difference]: With dead ends: 1056 [2021-07-09 17:28:47,357 INFO L226 Difference]: Without dead ends: 1025 [2021-07-09 17:28:47,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:28:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-09 17:28:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 993. [2021-07-09 17:28:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.194556451612903) internal successors, (3169), 992 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3169 transitions. [2021-07-09 17:28:47,368 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3169 transitions. Word has length 24 [2021-07-09 17:28:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:47,369 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3169 transitions. [2021-07-09 17:28:47,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3169 transitions. [2021-07-09 17:28:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:47,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:47,370 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:47,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-07-09 17:28:47,570 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash -184569286, now seen corresponding path program 105 times [2021-07-09 17:28:47,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:47,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835438342] [2021-07-09 17:28:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:47,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:47,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835438342] [2021-07-09 17:28:47,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835438342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:47,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633684912] [2021-07-09 17:28:47,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:47,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:47,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:47,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:47,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:47,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:47,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:59 [2021-07-09 17:28:47,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:47,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:47,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:48,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:48,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:48,065 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:48,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:48,070 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:48,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:48,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:48,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:48,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:48,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:48,228 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:48,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:48,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:48,234 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:48,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:48,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:48,293 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-07-09 17:28:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:48,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633684912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:48,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:48,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:48,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554415450] [2021-07-09 17:28:48,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:48,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:48,412 INFO L87 Difference]: Start difference. First operand 993 states and 3169 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:48,887 INFO L93 Difference]: Finished difference Result 1160 states and 3620 transitions. [2021-07-09 17:28:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:28:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:48,889 INFO L225 Difference]: With dead ends: 1160 [2021-07-09 17:28:48,889 INFO L226 Difference]: Without dead ends: 1094 [2021-07-09 17:28:48,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-07-09 17:28:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 991. [2021-07-09 17:28:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.195959595959596) internal successors, (3164), 990 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3164 transitions. [2021-07-09 17:28:48,901 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3164 transitions. Word has length 24 [2021-07-09 17:28:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:48,901 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3164 transitions. [2021-07-09 17:28:48,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3164 transitions. [2021-07-09 17:28:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:48,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:48,903 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:49,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-07-09 17:28:49,104 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:49,104 INFO L82 PathProgramCache]: Analyzing trace with hash -722062142, now seen corresponding path program 106 times [2021-07-09 17:28:49,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:49,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607325632] [2021-07-09 17:28:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:49,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:49,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607325632] [2021-07-09 17:28:49,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607325632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:49,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460950997] [2021-07-09 17:28:49,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:49,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:49,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:49,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:49,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:49,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:39 [2021-07-09 17:28:49,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:49,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:49,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:28:49,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:49,536 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:49,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:49,564 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:97, output treesize:27 [2021-07-09 17:28:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:49,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460950997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:49,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:49,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:28:49,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989430246] [2021-07-09 17:28:49,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:49,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:49,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:49,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:49,617 INFO L87 Difference]: Start difference. First operand 991 states and 3164 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:49,819 INFO L93 Difference]: Finished difference Result 1052 states and 3315 transitions. [2021-07-09 17:28:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:49,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:49,821 INFO L225 Difference]: With dead ends: 1052 [2021-07-09 17:28:49,821 INFO L226 Difference]: Without dead ends: 1013 [2021-07-09 17:28:49,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-07-09 17:28:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 991. [2021-07-09 17:28:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.195959595959596) internal successors, (3164), 990 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3164 transitions. [2021-07-09 17:28:49,832 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3164 transitions. Word has length 24 [2021-07-09 17:28:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:49,832 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3164 transitions. [2021-07-09 17:28:49,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3164 transitions. [2021-07-09 17:28:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:49,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:49,834 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:50,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:50,034 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash 664700228, now seen corresponding path program 107 times [2021-07-09 17:28:50,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:50,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773511169] [2021-07-09 17:28:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:50,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773511169] [2021-07-09 17:28:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773511169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907216629] [2021-07-09 17:28:50,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:50,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:28:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:50,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:50,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:50,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:50,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:50,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:50,337 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-07-09 17:28:50,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:50,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:50,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:50,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:50,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:50,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:50,613 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:50,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:50,617 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:50,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:50,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:50,645 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:28:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:50,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907216629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:50,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:50,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:50,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560029777] [2021-07-09 17:28:50,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:50,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:50,705 INFO L87 Difference]: Start difference. First operand 991 states and 3164 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:51,338 INFO L93 Difference]: Finished difference Result 1144 states and 3589 transitions. [2021-07-09 17:28:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:51,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:51,341 INFO L225 Difference]: With dead ends: 1144 [2021-07-09 17:28:51,341 INFO L226 Difference]: Without dead ends: 1085 [2021-07-09 17:28:51,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 596.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-07-09 17:28:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 999. [2021-07-09 17:28:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.2024048096192383) internal successors, (3196), 998 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3196 transitions. [2021-07-09 17:28:51,353 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3196 transitions. Word has length 24 [2021-07-09 17:28:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:51,353 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 3196 transitions. [2021-07-09 17:28:51,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3196 transitions. [2021-07-09 17:28:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:51,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:51,354 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:51,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable807,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:51,555 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:51,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1073271588, now seen corresponding path program 108 times [2021-07-09 17:28:51,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:51,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129437304] [2021-07-09 17:28:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:51,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:51,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129437304] [2021-07-09 17:28:51,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129437304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:51,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577225173] [2021-07-09 17:28:51,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:51,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:51,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:51,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:51,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:51,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:51,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-07-09 17:28:52,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:52,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:52,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:52,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:52,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:52,197 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:52,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:52,202 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:52,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:52,264 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:52,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:52,268 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:52,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:52,323 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-07-09 17:28:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:52,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577225173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:52,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:52,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:52,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644677630] [2021-07-09 17:28:52,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:52,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:52,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:52,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:52,425 INFO L87 Difference]: Start difference. First operand 999 states and 3196 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:53,043 INFO L93 Difference]: Finished difference Result 1153 states and 3592 transitions. [2021-07-09 17:28:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:28:53,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:53,045 INFO L225 Difference]: With dead ends: 1153 [2021-07-09 17:28:53,045 INFO L226 Difference]: Without dead ends: 1104 [2021-07-09 17:28:53,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:28:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-07-09 17:28:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 999. [2021-07-09 17:28:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.2024048096192383) internal successors, (3196), 998 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3196 transitions. [2021-07-09 17:28:53,057 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3196 transitions. Word has length 24 [2021-07-09 17:28:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:53,057 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 3196 transitions. [2021-07-09 17:28:53,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3196 transitions. [2021-07-09 17:28:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:53,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:53,059 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:53,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:53,259 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:53,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1407355204, now seen corresponding path program 109 times [2021-07-09 17:28:53,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:53,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561551432] [2021-07-09 17:28:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:53,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:53,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561551432] [2021-07-09 17:28:53,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561551432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:53,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197361848] [2021-07-09 17:28:53,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:53,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:53,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:53,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:53,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:53,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:53,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:53,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:28:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:53,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:53,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:53,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:53,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:53,983 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:54,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:54,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:54,015 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:54,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:54,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:54,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:34 [2021-07-09 17:28:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197361848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:54,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:54,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:54,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103129953] [2021-07-09 17:28:54,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:54,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:54,112 INFO L87 Difference]: Start difference. First operand 999 states and 3196 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:54,535 INFO L93 Difference]: Finished difference Result 1210 states and 3739 transitions. [2021-07-09 17:28:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:54,538 INFO L225 Difference]: With dead ends: 1210 [2021-07-09 17:28:54,538 INFO L226 Difference]: Without dead ends: 1133 [2021-07-09 17:28:54,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-07-09 17:28:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 996. [2021-07-09 17:28:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.201005025125628) internal successors, (3185), 995 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3185 transitions. [2021-07-09 17:28:54,550 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3185 transitions. Word has length 24 [2021-07-09 17:28:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:54,550 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3185 transitions. [2021-07-09 17:28:54,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3185 transitions. [2021-07-09 17:28:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:54,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:54,551 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:54,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable845 [2021-07-09 17:28:54,752 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:54,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1233463034, now seen corresponding path program 110 times [2021-07-09 17:28:54,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:54,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660255450] [2021-07-09 17:28:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:54,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:54,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660255450] [2021-07-09 17:28:54,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660255450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:54,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469513727] [2021-07-09 17:28:54,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:54,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:54,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:55,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:55,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:55,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:55,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:55,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:55,124 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:28:55,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:55,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:55,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:55,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:55,475 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:55,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:55,543 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:55,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:55,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:55,676 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:55,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:55,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:55,737 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:55,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:55,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:55,793 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:75 [2021-07-09 17:28:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:55,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469513727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:55,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:55,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:28:55,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849302862] [2021-07-09 17:28:55,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:55,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:55,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:55,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:55,896 INFO L87 Difference]: Start difference. First operand 996 states and 3185 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:56,274 INFO L93 Difference]: Finished difference Result 1203 states and 3735 transitions. [2021-07-09 17:28:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:56,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:56,277 INFO L225 Difference]: With dead ends: 1203 [2021-07-09 17:28:56,277 INFO L226 Difference]: Without dead ends: 1156 [2021-07-09 17:28:56,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:28:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-07-09 17:28:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1003. [2021-07-09 17:28:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.2135728542914173) internal successors, (3220), 1002 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3220 transitions. [2021-07-09 17:28:56,289 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3220 transitions. Word has length 24 [2021-07-09 17:28:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:56,289 INFO L482 AbstractCegarLoop]: Abstraction has 1003 states and 3220 transitions. [2021-07-09 17:28:56,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3220 transitions. [2021-07-09 17:28:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:56,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:56,291 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:56,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:56,496 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:56,497 INFO L82 PathProgramCache]: Analyzing trace with hash 353189498, now seen corresponding path program 111 times [2021-07-09 17:28:56,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:56,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424810461] [2021-07-09 17:28:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:56,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:56,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424810461] [2021-07-09 17:28:56,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424810461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:56,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100112488] [2021-07-09 17:28:56,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:56,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:28:56,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:56,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:56,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:28:56,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-07-09 17:28:56,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:56,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:56,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:56,953 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:56,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:56,958 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:57,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:57,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:57,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:57,038 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:57,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:57,122 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:57,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:28:57,127 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:57,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:57,190 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:75 [2021-07-09 17:28:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:28:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100112488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:57,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:57,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:28:57,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544764760] [2021-07-09 17:28:57,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:57,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:57,323 INFO L87 Difference]: Start difference. First operand 1003 states and 3220 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:57,926 INFO L93 Difference]: Finished difference Result 1179 states and 3665 transitions. [2021-07-09 17:28:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:28:57,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:57,928 INFO L225 Difference]: With dead ends: 1179 [2021-07-09 17:28:57,928 INFO L226 Difference]: Without dead ends: 1138 [2021-07-09 17:28:57,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:28:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-07-09 17:28:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 997. [2021-07-09 17:28:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 3.2028112449799195) internal successors, (3190), 996 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 3190 transitions. [2021-07-09 17:28:57,940 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 3190 transitions. Word has length 24 [2021-07-09 17:28:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:57,940 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 3190 transitions. [2021-07-09 17:28:57,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 3190 transitions. [2021-07-09 17:28:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:57,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:57,942 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:58,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable863 [2021-07-09 17:28:58,143 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2067234404, now seen corresponding path program 112 times [2021-07-09 17:28:58,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:58,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612682770] [2021-07-09 17:28:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:58,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:58,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612682770] [2021-07-09 17:28:58,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612682770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:58,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512719359] [2021-07-09 17:28:58,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:58,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:58,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:58,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:58,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:58,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:58,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:58,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:58,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:58,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:58,629 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:28:58,816 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:28:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:58,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:58,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:58,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:28:58,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,928 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.8 percent of original size [2021-07-09 17:28:58,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:28:58,934 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:58,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:28:58,938 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:28:58,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:58,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:28:58,988 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-07-09 17:28:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:59,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512719359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:59,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:59,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:28:59,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393840240] [2021-07-09 17:28:59,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:59,071 INFO L87 Difference]: Start difference. First operand 997 states and 3190 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:59,441 INFO L93 Difference]: Finished difference Result 1119 states and 3535 transitions. [2021-07-09 17:28:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:59,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:28:59,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:59,443 INFO L225 Difference]: With dead ends: 1119 [2021-07-09 17:28:59,443 INFO L226 Difference]: Without dead ends: 1066 [2021-07-09 17:28:59,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-07-09 17:28:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1000. [2021-07-09 17:28:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 3.2032032032032034) internal successors, (3200), 999 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3200 transitions. [2021-07-09 17:28:59,455 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3200 transitions. Word has length 24 [2021-07-09 17:28:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:59,455 INFO L482 AbstractCegarLoop]: Abstraction has 1000 states and 3200 transitions. [2021-07-09 17:28:59,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3200 transitions. [2021-07-09 17:28:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:28:59,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:59,457 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:59,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-07-09 17:28:59,665 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash 98903938, now seen corresponding path program 113 times [2021-07-09 17:28:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922744282] [2021-07-09 17:28:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:28:59,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:59,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922744282] [2021-07-09 17:28:59,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922744282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:59,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338659105] [2021-07-09 17:28:59,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:59,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:28:59,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:59,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:59,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:59,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:00,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:00,007 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:29:00,087 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:29:00,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:00,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:00,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:00,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:00,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:00,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:00,176 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:00,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:00,180 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:00,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:00,185 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:00,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:00,189 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:00,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:00,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:00,254 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-07-09 17:29:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:00,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338659105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:00,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:00,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:29:00,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416381587] [2021-07-09 17:29:00,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:00,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:00,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:00,356 INFO L87 Difference]: Start difference. First operand 1000 states and 3200 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:00,663 INFO L93 Difference]: Finished difference Result 1149 states and 3599 transitions. [2021-07-09 17:29:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:00,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:00,665 INFO L225 Difference]: With dead ends: 1149 [2021-07-09 17:29:00,666 INFO L226 Difference]: Without dead ends: 1102 [2021-07-09 17:29:00,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-07-09 17:29:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1007. [2021-07-09 17:29:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2157057654075545) internal successors, (3235), 1006 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3235 transitions. [2021-07-09 17:29:00,678 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3235 transitions. Word has length 24 [2021-07-09 17:29:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:00,678 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3235 transitions. [2021-07-09 17:29:00,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3235 transitions. [2021-07-09 17:29:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:00,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:00,680 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:00,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-07-09 17:29:00,880 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash -781369598, now seen corresponding path program 114 times [2021-07-09 17:29:00,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:00,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948354957] [2021-07-09 17:29:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:01,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:01,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948354957] [2021-07-09 17:29:01,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948354957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:01,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008107787] [2021-07-09 17:29:01,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:01,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:01,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:01,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:01,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:01,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:01,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:01,299 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:29:01,441 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-07-09 17:29:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:01,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:01,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:01,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:01,478 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:01,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,681 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-07-09 17:29:01,681 INFO L628 ElimStorePlain]: treesize reduction 172, result has 54.0 percent of original size [2021-07-09 17:29:01,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:01,687 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:01,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:01,692 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:01,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:01,696 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:01,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:01,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:01,787 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-07-09 17:29:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:01,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008107787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:01,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:01,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:01,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444924651] [2021-07-09 17:29:01,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:01,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:01,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:01,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:01,921 INFO L87 Difference]: Start difference. First operand 1007 states and 3235 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:02,327 INFO L93 Difference]: Finished difference Result 1344 states and 4106 transitions. [2021-07-09 17:29:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:02,330 INFO L225 Difference]: With dead ends: 1344 [2021-07-09 17:29:02,330 INFO L226 Difference]: Without dead ends: 1226 [2021-07-09 17:29:02,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-07-09 17:29:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 999. [2021-07-09 17:29:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.2064128256513027) internal successors, (3200), 998 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3200 transitions. [2021-07-09 17:29:02,345 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3200 transitions. Word has length 24 [2021-07-09 17:29:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:02,345 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 3200 transitions. [2021-07-09 17:29:02,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3200 transitions. [2021-07-09 17:29:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:02,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:02,346 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:02,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-07-09 17:29:02,547 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:02,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:02,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2007079852, now seen corresponding path program 115 times [2021-07-09 17:29:02,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:02,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70951078] [2021-07-09 17:29:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:02,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70951078] [2021-07-09 17:29:02,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70951078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813472668] [2021-07-09 17:29:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:02,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:02,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:02,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:02,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:02,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:02,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:02,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:02,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:02,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:02,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:02,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:02,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:02,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:02,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:02,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:02,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:02,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:02,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:02,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:29:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:03,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:03,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:03,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:03,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:03,301 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-07-09 17:29:03,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:03,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:03,305 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:03,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:03,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:03,315 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-07-09 17:29:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:03,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813472668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:03,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:03,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:03,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610426710] [2021-07-09 17:29:03,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:03,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:03,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:03,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:03,348 INFO L87 Difference]: Start difference. First operand 999 states and 3200 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:03,769 INFO L93 Difference]: Finished difference Result 1106 states and 3468 transitions. [2021-07-09 17:29:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:29:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:03,771 INFO L225 Difference]: With dead ends: 1106 [2021-07-09 17:29:03,771 INFO L226 Difference]: Without dead ends: 1035 [2021-07-09 17:29:03,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 504.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-07-09 17:29:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1009. [2021-07-09 17:29:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.2113095238095237) internal successors, (3237), 1008 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3237 transitions. [2021-07-09 17:29:03,783 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3237 transitions. Word has length 24 [2021-07-09 17:29:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:03,783 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 3237 transitions. [2021-07-09 17:29:03,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3237 transitions. [2021-07-09 17:29:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:03,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:03,784 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:03,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-09 17:29:03,985 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 549915628, now seen corresponding path program 116 times [2021-07-09 17:29:03,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:03,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900784653] [2021-07-09 17:29:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:04,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:04,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900784653] [2021-07-09 17:29:04,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900784653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:04,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743717922] [2021-07-09 17:29:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:04,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:04,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:04,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:04,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:04,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:04,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:04,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:04,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:04,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-07-09 17:29:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:04,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:04,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,665 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:29:04,666 INFO L628 ElimStorePlain]: treesize reduction 49, result has 68.4 percent of original size [2021-07-09 17:29:04,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:04,670 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:04,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:04,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:29:04,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:04,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:04,764 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:04,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:04,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:29:04,802 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:169, output treesize:47 [2021-07-09 17:29:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:04,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743717922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:04,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:04,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:04,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837184861] [2021-07-09 17:29:04,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:04,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:04,884 INFO L87 Difference]: Start difference. First operand 1009 states and 3237 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:05,293 INFO L93 Difference]: Finished difference Result 1241 states and 3818 transitions. [2021-07-09 17:29:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:05,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:05,296 INFO L225 Difference]: With dead ends: 1241 [2021-07-09 17:29:05,296 INFO L226 Difference]: Without dead ends: 1165 [2021-07-09 17:29:05,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-07-09 17:29:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1017. [2021-07-09 17:29:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.199803149606299) internal successors, (3251), 1016 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3251 transitions. [2021-07-09 17:29:05,308 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3251 transitions. Word has length 24 [2021-07-09 17:29:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:05,308 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3251 transitions. [2021-07-09 17:29:05,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3251 transitions. [2021-07-09 17:29:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:05,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:05,310 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:05,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable921,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:05,510 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash 56161842, now seen corresponding path program 117 times [2021-07-09 17:29:05,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:05,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558044612] [2021-07-09 17:29:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:05,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558044612] [2021-07-09 17:29:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558044612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687463618] [2021-07-09 17:29:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:05,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:05,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:05,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:05,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:05,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:05,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:05,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-07-09 17:29:05,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:05,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:05,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:05,958 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:05,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:05,961 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:05,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:05,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:25 [2021-07-09 17:29:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:06,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687463618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:06,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:06,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501823888] [2021-07-09 17:29:06,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:06,043 INFO L87 Difference]: Start difference. First operand 1017 states and 3251 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:06,550 INFO L93 Difference]: Finished difference Result 1202 states and 3720 transitions. [2021-07-09 17:29:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:06,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:06,553 INFO L225 Difference]: With dead ends: 1202 [2021-07-09 17:29:06,553 INFO L226 Difference]: Without dead ends: 1104 [2021-07-09 17:29:06,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-07-09 17:29:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1030. [2021-07-09 17:29:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.2031098153547135) internal successors, (3296), 1029 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3296 transitions. [2021-07-09 17:29:06,564 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3296 transitions. Word has length 24 [2021-07-09 17:29:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:06,565 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3296 transitions. [2021-07-09 17:29:06,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3296 transitions. [2021-07-09 17:29:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:06,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:06,566 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:06,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable930,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:06,767 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:06,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1264424876, now seen corresponding path program 118 times [2021-07-09 17:29:06,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:06,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100291504] [2021-07-09 17:29:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:06,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100291504] [2021-07-09 17:29:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100291504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960366194] [2021-07-09 17:29:06,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:07,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:07,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:07,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:07,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:07,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:07,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:07,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:07,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:07,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-07-09 17:29:07,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:07,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:07,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:07,461 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:07,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:07,489 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:07,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:07,512 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:31 [2021-07-09 17:29:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960366194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:07,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:07,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:07,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790407695] [2021-07-09 17:29:07,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:07,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:07,581 INFO L87 Difference]: Start difference. First operand 1030 states and 3296 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:08,025 INFO L93 Difference]: Finished difference Result 1258 states and 3911 transitions. [2021-07-09 17:29:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:08,027 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 17:29:08,027 INFO L226 Difference]: Without dead ends: 1181 [2021-07-09 17:29:08,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-09 17:29:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1023. [2021-07-09 17:29:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.204500978473581) internal successors, (3275), 1022 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3275 transitions. [2021-07-09 17:29:08,040 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3275 transitions. Word has length 24 [2021-07-09 17:29:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:08,040 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3275 transitions. [2021-07-09 17:29:08,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3275 transitions. [2021-07-09 17:29:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:08,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:08,041 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:08,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable939 [2021-07-09 17:29:08,242 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1438317046, now seen corresponding path program 119 times [2021-07-09 17:29:08,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:08,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435775015] [2021-07-09 17:29:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:08,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:08,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435775015] [2021-07-09 17:29:08,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435775015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:08,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038500224] [2021-07-09 17:29:08,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:08,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:08,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:08,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:08,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:08,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:08,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:08,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:08,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:08,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:08,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-07-09 17:29:08,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:08,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:08,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:08,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:08,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:08,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:08,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:08,877 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:08,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:08,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:08,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:08,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:09,008 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:09,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:09,070 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:09,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:09,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:09,183 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:09,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:09,233 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-07-09 17:29:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:09,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038500224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:09,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:09,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:29:09,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885144702] [2021-07-09 17:29:09,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:09,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:09,343 INFO L87 Difference]: Start difference. First operand 1023 states and 3275 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:09,673 INFO L93 Difference]: Finished difference Result 1283 states and 3968 transitions. [2021-07-09 17:29:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:29:09,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:09,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:09,675 INFO L225 Difference]: With dead ends: 1283 [2021-07-09 17:29:09,675 INFO L226 Difference]: Without dead ends: 1236 [2021-07-09 17:29:09,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-07-09 17:29:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1033. [2021-07-09 17:29:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.2228682170542635) internal successors, (3326), 1032 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3326 transitions. [2021-07-09 17:29:09,689 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3326 transitions. Word has length 24 [2021-07-09 17:29:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:09,689 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3326 transitions. [2021-07-09 17:29:09,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3326 transitions. [2021-07-09 17:29:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:09,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:09,694 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:09,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:09,905 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1976376714, now seen corresponding path program 120 times [2021-07-09 17:29:09,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:09,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889479159] [2021-07-09 17:29:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:10,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:10,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889479159] [2021-07-09 17:29:10,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889479159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:10,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522191134] [2021-07-09 17:29:10,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:10,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:29:10,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:29:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:10,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:10,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:10,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:10,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-07-09 17:29:10,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:10,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:10,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:10,435 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:10,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:10,440 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:10,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:10,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:10,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:10,513 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:10,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:10,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:10,575 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:10,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:10,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:10,580 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:10,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:10,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:10,634 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:69 [2021-07-09 17:29:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:10,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522191134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:10,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:10,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:10,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611780649] [2021-07-09 17:29:10,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:10,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:10,774 INFO L87 Difference]: Start difference. First operand 1033 states and 3326 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:11,200 INFO L93 Difference]: Finished difference Result 1397 states and 4269 transitions. [2021-07-09 17:29:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:11,203 INFO L225 Difference]: With dead ends: 1397 [2021-07-09 17:29:11,203 INFO L226 Difference]: Without dead ends: 1340 [2021-07-09 17:29:11,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-07-09 17:29:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1030. [2021-07-09 17:29:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.2176870748299318) internal successors, (3311), 1029 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3311 transitions. [2021-07-09 17:29:11,222 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3311 transitions. Word has length 24 [2021-07-09 17:29:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:11,222 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3311 transitions. [2021-07-09 17:29:11,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3311 transitions. [2021-07-09 17:29:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:11,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:11,224 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:11,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:11,437 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:11,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1969687262, now seen corresponding path program 121 times [2021-07-09 17:29:11,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:11,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574189770] [2021-07-09 17:29:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:11,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:11,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574189770] [2021-07-09 17:29:11,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574189770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176976522] [2021-07-09 17:29:11,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:11,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:11,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:11,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:11,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:11,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-07-09 17:29:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:11,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:11,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:11,831 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:11,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:11,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2021-07-09 17:29:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:11,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176976522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:11,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:11,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889412137] [2021-07-09 17:29:11,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:11,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:11,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:11,881 INFO L87 Difference]: Start difference. First operand 1030 states and 3311 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:12,148 INFO L93 Difference]: Finished difference Result 1136 states and 3592 transitions. [2021-07-09 17:29:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:12,150 INFO L225 Difference]: With dead ends: 1136 [2021-07-09 17:29:12,151 INFO L226 Difference]: Without dead ends: 1105 [2021-07-09 17:29:12,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-07-09 17:29:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1026. [2021-07-09 17:29:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.227317073170732) internal successors, (3308), 1025 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3308 transitions. [2021-07-09 17:29:12,163 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3308 transitions. Word has length 24 [2021-07-09 17:29:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:12,163 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 3308 transitions. [2021-07-09 17:29:12,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3308 transitions. [2021-07-09 17:29:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:12,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:12,164 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:12,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-09 17:29:12,365 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1879028642, now seen corresponding path program 122 times [2021-07-09 17:29:12,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:12,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093337121] [2021-07-09 17:29:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:12,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093337121] [2021-07-09 17:29:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093337121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583243517] [2021-07-09 17:29:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:12,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:12,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:12,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:12,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:12,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:12,668 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-07-09 17:29:12,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:12,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:12,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:12,893 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:12,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:12,924 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:12,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:12,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-07-09 17:29:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:13,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583243517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:13,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:13,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:13,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687250969] [2021-07-09 17:29:13,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:13,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:13,035 INFO L87 Difference]: Start difference. First operand 1026 states and 3308 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:13,262 INFO L93 Difference]: Finished difference Result 1118 states and 3542 transitions. [2021-07-09 17:29:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:13,264 INFO L225 Difference]: With dead ends: 1118 [2021-07-09 17:29:13,264 INFO L226 Difference]: Without dead ends: 1099 [2021-07-09 17:29:13,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-09 17:29:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1008. [2021-07-09 17:29:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 3.2055610724925523) internal successors, (3228), 1007 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 3228 transitions. [2021-07-09 17:29:13,277 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 3228 transitions. Word has length 24 [2021-07-09 17:29:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:13,277 INFO L482 AbstractCegarLoop]: Abstraction has 1008 states and 3228 transitions. [2021-07-09 17:29:13,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 3228 transitions. [2021-07-09 17:29:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:13,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:13,279 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:13,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:13,479 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:13,479 INFO L82 PathProgramCache]: Analyzing trace with hash -934962452, now seen corresponding path program 123 times [2021-07-09 17:29:13,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:13,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404763868] [2021-07-09 17:29:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:13,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:13,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404763868] [2021-07-09 17:29:13,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404763868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:13,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084688673] [2021-07-09 17:29:13,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:13,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:13,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:13,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:13,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:13,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:13,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:13,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:13,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:13,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:13,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:13,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:29:13,838 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:29:13,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:13,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:13,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:13,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:13,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:13,875 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:13,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:13,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:13,878 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:13,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:13,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:13,903 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-07-09 17:29:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:13,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084688673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:13,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:13,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:13,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671437817] [2021-07-09 17:29:13,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:13,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:13,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:13,994 INFO L87 Difference]: Start difference. First operand 1008 states and 3228 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:14,183 INFO L93 Difference]: Finished difference Result 1147 states and 3613 transitions. [2021-07-09 17:29:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:14,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:14,186 INFO L225 Difference]: With dead ends: 1147 [2021-07-09 17:29:14,186 INFO L226 Difference]: Without dead ends: 1085 [2021-07-09 17:29:14,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-07-09 17:29:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1005. [2021-07-09 17:29:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.2071713147410357) internal successors, (3220), 1004 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3220 transitions. [2021-07-09 17:29:14,197 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3220 transitions. Word has length 24 [2021-07-09 17:29:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:14,197 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3220 transitions. [2021-07-09 17:29:14,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3220 transitions. [2021-07-09 17:29:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:14,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:14,199 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:14,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:14,399 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:14,399 INFO L82 PathProgramCache]: Analyzing trace with hash -303757950, now seen corresponding path program 124 times [2021-07-09 17:29:14,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:14,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694908613] [2021-07-09 17:29:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:14,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:14,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694908613] [2021-07-09 17:29:14,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694908613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:14,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147036040] [2021-07-09 17:29:14,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:14,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:14,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:14,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:14,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:14,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:14,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:14,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:14,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:14,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:14,825 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:29:14,929 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:29:14,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:14,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:14,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:14,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:14,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:14,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:14,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:14,963 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:14,967 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,161 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-09 17:29:15,161 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-07-09 17:29:15,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:15,166 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:15,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:15,171 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:15,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:15,176 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:15,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:15,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:15,246 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-07-09 17:29:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147036040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:15,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:15,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859670741] [2021-07-09 17:29:15,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:15,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:15,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:15,394 INFO L87 Difference]: Start difference. First operand 1005 states and 3220 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:15,859 INFO L93 Difference]: Finished difference Result 1417 states and 4391 transitions. [2021-07-09 17:29:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:29:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:15,861 INFO L225 Difference]: With dead ends: 1417 [2021-07-09 17:29:15,861 INFO L226 Difference]: Without dead ends: 1337 [2021-07-09 17:29:15,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-07-09 17:29:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1019. [2021-07-09 17:29:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.219056974459725) internal successors, (3277), 1018 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3277 transitions. [2021-07-09 17:29:15,875 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3277 transitions. Word has length 24 [2021-07-09 17:29:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:15,875 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3277 transitions. [2021-07-09 17:29:15,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3277 transitions. [2021-07-09 17:29:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:15,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:15,877 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:16,077 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1647329100, now seen corresponding path program 125 times [2021-07-09 17:29:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742332331] [2021-07-09 17:29:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:16,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:16,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742332331] [2021-07-09 17:29:16,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742332331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:16,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220063505] [2021-07-09 17:29:16,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:16,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:16,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:16,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:16,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:16,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:16,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:16,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:16,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:16,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:16,484 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:29:16,572 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:29:16,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:16,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:16,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:16,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:16,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:16,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:16,600 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:16,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:16,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:16,764 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-07-09 17:29:16,764 INFO L628 ElimStorePlain]: treesize reduction 144, result has 51.5 percent of original size [2021-07-09 17:29:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:16,769 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:16,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:16,774 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:16,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:16,778 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:16,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:16,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:16,841 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:345, output treesize:81 [2021-07-09 17:29:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:16,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220063505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:16,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:16,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:16,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917872876] [2021-07-09 17:29:16,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:16,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:16,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:16,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:16,980 INFO L87 Difference]: Start difference. First operand 1019 states and 3277 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:17,270 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-07-09 17:29:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:17,793 INFO L93 Difference]: Finished difference Result 1429 states and 4368 transitions. [2021-07-09 17:29:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:29:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:17,795 INFO L225 Difference]: With dead ends: 1429 [2021-07-09 17:29:17,795 INFO L226 Difference]: Without dead ends: 1352 [2021-07-09 17:29:17,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-07-09 17:29:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1024. [2021-07-09 17:29:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.222873900293255) internal successors, (3297), 1023 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3297 transitions. [2021-07-09 17:29:17,809 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3297 transitions. Word has length 24 [2021-07-09 17:29:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:17,809 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3297 transitions. [2021-07-09 17:29:17,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3297 transitions. [2021-07-09 17:29:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:17,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:17,810 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:18,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-07-09 17:29:18,011 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash 470446420, now seen corresponding path program 126 times [2021-07-09 17:29:18,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:18,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887738312] [2021-07-09 17:29:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:18,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:18,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887738312] [2021-07-09 17:29:18,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887738312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615157082] [2021-07-09 17:29:18,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:18,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:18,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:18,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:18,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:18,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:18,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:18,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:29:18,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:18,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:18,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:18,470 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:18,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:18,473 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:18,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:18,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-07-09 17:29:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:18,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615157082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:18,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81976514] [2021-07-09 17:29:18,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:18,596 INFO L87 Difference]: Start difference. First operand 1024 states and 3297 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:19,263 INFO L93 Difference]: Finished difference Result 1272 states and 4010 transitions. [2021-07-09 17:29:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:19,265 INFO L225 Difference]: With dead ends: 1272 [2021-07-09 17:29:19,265 INFO L226 Difference]: Without dead ends: 1213 [2021-07-09 17:29:19,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-07-09 17:29:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1006. [2021-07-09 17:29:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.207960199004975) internal successors, (3224), 1005 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3224 transitions. [2021-07-09 17:29:19,277 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3224 transitions. Word has length 24 [2021-07-09 17:29:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:19,278 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3224 transitions. [2021-07-09 17:29:19,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3224 transitions. [2021-07-09 17:29:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:19,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:19,279 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:19,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-07-09 17:29:19,480 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1416139284, now seen corresponding path program 127 times [2021-07-09 17:29:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:19,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604929369] [2021-07-09 17:29:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:19,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:19,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604929369] [2021-07-09 17:29:19,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604929369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051911073] [2021-07-09 17:29:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:19,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:19,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:19,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:19,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:19,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:19,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:19,875 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-07-09 17:29:20,070 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:29:20,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:20,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:20,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:20,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:20,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,176 INFO L628 ElimStorePlain]: treesize reduction 66, result has 60.0 percent of original size [2021-07-09 17:29:20,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:20,181 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:20,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:20,185 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:20,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:29:20,226 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:205, output treesize:47 [2021-07-09 17:29:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051911073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:20,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:20,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088434853] [2021-07-09 17:29:20,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:20,322 INFO L87 Difference]: Start difference. First operand 1006 states and 3224 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:20,734 INFO L93 Difference]: Finished difference Result 1113 states and 3533 transitions. [2021-07-09 17:29:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:20,736 INFO L225 Difference]: With dead ends: 1113 [2021-07-09 17:29:20,736 INFO L226 Difference]: Without dead ends: 1060 [2021-07-09 17:29:20,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-07-09 17:29:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1012. [2021-07-09 17:29:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.207715133531157) internal successors, (3243), 1011 states have internal predecessors, (3243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3243 transitions. [2021-07-09 17:29:20,748 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3243 transitions. Word has length 24 [2021-07-09 17:29:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:20,748 INFO L482 AbstractCegarLoop]: Abstraction has 1012 states and 3243 transitions. [2021-07-09 17:29:20,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3243 transitions. [2021-07-09 17:29:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:20,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:20,749 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:20,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1006 [2021-07-09 17:29:20,963 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:20,963 INFO L82 PathProgramCache]: Analyzing trace with hash 910497546, now seen corresponding path program 128 times [2021-07-09 17:29:20,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:20,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830530579] [2021-07-09 17:29:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:21,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:21,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830530579] [2021-07-09 17:29:21,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830530579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507304505] [2021-07-09 17:29:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:21,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:21,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:21,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:21,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:21,369 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-07-09 17:29:21,506 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-07-09 17:29:21,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:21,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:21,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:21,535 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:21,540 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:21,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:21,730 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-09 17:29:21,730 INFO L628 ElimStorePlain]: treesize reduction 167, result has 53.5 percent of original size [2021-07-09 17:29:21,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:21,736 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:21,741 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:21,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:21,746 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:21,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:21,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:21,833 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-07-09 17:29:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:21,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507304505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:21,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890778713] [2021-07-09 17:29:21,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:21,998 INFO L87 Difference]: Start difference. First operand 1012 states and 3243 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:22,482 INFO L93 Difference]: Finished difference Result 1229 states and 3846 transitions. [2021-07-09 17:29:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:22,485 INFO L225 Difference]: With dead ends: 1229 [2021-07-09 17:29:22,485 INFO L226 Difference]: Without dead ends: 1149 [2021-07-09 17:29:22,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-07-09 17:29:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1015. [2021-07-09 17:29:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.2080867850098618) internal successors, (3253), 1014 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3253 transitions. [2021-07-09 17:29:22,498 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3253 transitions. Word has length 24 [2021-07-09 17:29:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:22,498 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3253 transitions. [2021-07-09 17:29:22,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3253 transitions. [2021-07-09 17:29:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:22,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:22,500 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:22,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-07-09 17:29:22,719 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:22,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1784879286, now seen corresponding path program 129 times [2021-07-09 17:29:22,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:22,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70852130] [2021-07-09 17:29:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:22,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:22,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70852130] [2021-07-09 17:29:22,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70852130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:22,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679401005] [2021-07-09 17:29:22,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:22,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:22,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:23,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:23,129 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-07-09 17:29:23,282 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-07-09 17:29:23,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:23,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:23,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:23,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:23,322 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,501 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-09 17:29:23,501 INFO L628 ElimStorePlain]: treesize reduction 166, result has 53.6 percent of original size [2021-07-09 17:29:23,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:23,507 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:23,512 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:23,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:23,516 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:23,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:23,595 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-07-09 17:29:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:23,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679401005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:23,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:23,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:23,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001139929] [2021-07-09 17:29:23,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:23,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:23,739 INFO L87 Difference]: Start difference. First operand 1015 states and 3253 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:24,433 INFO L93 Difference]: Finished difference Result 1378 states and 4206 transitions. [2021-07-09 17:29:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:24,436 INFO L225 Difference]: With dead ends: 1378 [2021-07-09 17:29:24,436 INFO L226 Difference]: Without dead ends: 1256 [2021-07-09 17:29:24,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 792.6ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-07-09 17:29:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1026. [2021-07-09 17:29:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.2234146341463417) internal successors, (3304), 1025 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3304 transitions. [2021-07-09 17:29:24,449 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3304 transitions. Word has length 24 [2021-07-09 17:29:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:24,449 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 3304 transitions. [2021-07-09 17:29:24,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3304 transitions. [2021-07-09 17:29:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:24,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:24,451 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:24,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-07-09 17:29:24,651 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:24,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:24,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1115351558, now seen corresponding path program 130 times [2021-07-09 17:29:24,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:24,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946498922] [2021-07-09 17:29:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:24,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946498922] [2021-07-09 17:29:24,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946498922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344650152] [2021-07-09 17:29:24,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:24,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:24,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:24,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:24,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:24,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:24,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:25,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:25,043 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:29:25,150 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:29:25,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:25,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:25,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:25,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:25,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:25,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:25,231 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:25,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:25,236 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:25,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:25,241 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:25,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:25,245 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:25,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:25,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:25,302 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-07-09 17:29:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:25,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344650152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:25,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:25,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:25,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205767400] [2021-07-09 17:29:25,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:25,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:25,448 INFO L87 Difference]: Start difference. First operand 1026 states and 3304 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:25,945 INFO L93 Difference]: Finished difference Result 1346 states and 4191 transitions. [2021-07-09 17:29:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:25,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:25,948 INFO L225 Difference]: With dead ends: 1346 [2021-07-09 17:29:25,948 INFO L226 Difference]: Without dead ends: 1253 [2021-07-09 17:29:25,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 698.7ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-07-09 17:29:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1037. [2021-07-09 17:29:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.2345559845559846) internal successors, (3351), 1036 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3351 transitions. [2021-07-09 17:29:25,961 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3351 transitions. Word has length 24 [2021-07-09 17:29:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:25,961 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3351 transitions. [2021-07-09 17:29:25,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3351 transitions. [2021-07-09 17:29:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:25,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:25,962 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:26,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1034,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:26,163 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash -341147188, now seen corresponding path program 131 times [2021-07-09 17:29:26,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:26,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099861983] [2021-07-09 17:29:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:26,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099861983] [2021-07-09 17:29:26,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099861983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80926472] [2021-07-09 17:29:26,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:26,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:26,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:26,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:26,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:26,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:26,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:26,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:29:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:26,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:26,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:26,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:26,661 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:26,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:26,664 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:26,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:26,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:26,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:31 [2021-07-09 17:29:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:26,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80926472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:26,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:26,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779803392] [2021-07-09 17:29:26,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:26,778 INFO L87 Difference]: Start difference. First operand 1037 states and 3351 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:27,286 INFO L93 Difference]: Finished difference Result 1192 states and 3822 transitions. [2021-07-09 17:29:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:27,289 INFO L225 Difference]: With dead ends: 1192 [2021-07-09 17:29:27,289 INFO L226 Difference]: Without dead ends: 1146 [2021-07-09 17:29:27,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-07-09 17:29:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1027. [2021-07-09 17:29:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.224171539961014) internal successors, (3308), 1026 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3308 transitions. [2021-07-09 17:29:27,301 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3308 transitions. Word has length 24 [2021-07-09 17:29:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:27,301 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3308 transitions. [2021-07-09 17:29:27,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3308 transitions. [2021-07-09 17:29:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:27,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:27,302 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:27,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-07-09 17:29:27,503 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:27,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash -189188054, now seen corresponding path program 132 times [2021-07-09 17:29:27,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:27,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213964014] [2021-07-09 17:29:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:27,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213964014] [2021-07-09 17:29:27,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213964014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721228151] [2021-07-09 17:29:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:27,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:27,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:27,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:27,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:27,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:27,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:27,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:27,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:27,780 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:49 [2021-07-09 17:29:27,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:27,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:27,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:27,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:27,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:27,908 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:27,911 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:27,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:27,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:27,937 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:29:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:27,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721228151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:27,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:27,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:27,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414490705] [2021-07-09 17:29:27,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:27,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:27,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:27,985 INFO L87 Difference]: Start difference. First operand 1027 states and 3308 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:28,480 INFO L93 Difference]: Finished difference Result 1128 states and 3592 transitions. [2021-07-09 17:29:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:28,482 INFO L225 Difference]: With dead ends: 1128 [2021-07-09 17:29:28,482 INFO L226 Difference]: Without dead ends: 1069 [2021-07-09 17:29:28,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-07-09 17:29:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1031. [2021-07-09 17:29:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.224271844660194) internal successors, (3321), 1030 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3321 transitions. [2021-07-09 17:29:28,493 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3321 transitions. Word has length 24 [2021-07-09 17:29:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:28,493 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3321 transitions. [2021-07-09 17:29:28,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3321 transitions. [2021-07-09 17:29:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:28,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:28,495 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:28,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-07-09 17:29:28,695 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:28,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1927159870, now seen corresponding path program 133 times [2021-07-09 17:29:28,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:28,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787051849] [2021-07-09 17:29:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:28,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:28,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787051849] [2021-07-09 17:29:28,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787051849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951270947] [2021-07-09 17:29:28,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:28,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:28,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:29,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:29,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:29,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:29:29,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:29,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:29,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:29,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:57 [2021-07-09 17:29:29,093 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:29:29,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:29,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:29,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:29,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:29,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:29,128 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:29,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:29,132 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:29,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:29,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:29,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:27 [2021-07-09 17:29:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:29,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951270947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:29,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:29,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:29,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338478001] [2021-07-09 17:29:29,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:29,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:29,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:29,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:29,230 INFO L87 Difference]: Start difference. First operand 1031 states and 3321 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:29,415 INFO L93 Difference]: Finished difference Result 1090 states and 3465 transitions. [2021-07-09 17:29:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:29,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:29,417 INFO L225 Difference]: With dead ends: 1090 [2021-07-09 17:29:29,417 INFO L226 Difference]: Without dead ends: 1055 [2021-07-09 17:29:29,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-07-09 17:29:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1033. [2021-07-09 17:29:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.2228682170542635) internal successors, (3326), 1032 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3326 transitions. [2021-07-09 17:29:29,428 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3326 transitions. Word has length 24 [2021-07-09 17:29:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:29,428 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3326 transitions. [2021-07-09 17:29:29,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3326 transitions. [2021-07-09 17:29:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:29,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:29,430 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:29,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-07-09 17:29:29,645 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1830314570, now seen corresponding path program 134 times [2021-07-09 17:29:29,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:29,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966820169] [2021-07-09 17:29:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:29,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:29,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966820169] [2021-07-09 17:29:29,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966820169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:29,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034569836] [2021-07-09 17:29:29,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:29,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:29,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:29,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:29,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:29,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:29,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:29,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:29,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:29,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:29,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:29,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:99, output treesize:77 [2021-07-09 17:29:30,039 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:29:30,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:30,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:30,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:30,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:30,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,143 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.6 percent of original size [2021-07-09 17:29:30,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:30,148 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:30,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:30,152 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:30,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:30,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:29:30,192 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-07-09 17:29:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:30,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034569836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:30,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:30,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621848636] [2021-07-09 17:29:30,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:30,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:30,267 INFO L87 Difference]: Start difference. First operand 1033 states and 3326 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:30,482 INFO L93 Difference]: Finished difference Result 1094 states and 3463 transitions. [2021-07-09 17:29:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:30,482 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:30,484 INFO L225 Difference]: With dead ends: 1094 [2021-07-09 17:29:30,484 INFO L226 Difference]: Without dead ends: 1041 [2021-07-09 17:29:30,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-07-09 17:29:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1031. [2021-07-09 17:29:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.224271844660194) internal successors, (3321), 1030 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3321 transitions. [2021-07-09 17:29:30,495 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3321 transitions. Word has length 24 [2021-07-09 17:29:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:30,495 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3321 transitions. [2021-07-09 17:29:30,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3321 transitions. [2021-07-09 17:29:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:30,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:30,497 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:30,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:30,697 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1077890356, now seen corresponding path program 135 times [2021-07-09 17:29:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:30,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756566271] [2021-07-09 17:29:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:30,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:30,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756566271] [2021-07-09 17:29:30,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756566271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712166126] [2021-07-09 17:29:30,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:30,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:30,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:30,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:30,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:30,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:30,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:30,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:31,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:31,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:29:31,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:31,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:31,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:31,243 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:31,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:31,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,252 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-07-09 17:29:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:31,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712166126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:31,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:31,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246648367] [2021-07-09 17:29:31,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:31,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:31,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:31,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:31,289 INFO L87 Difference]: Start difference. First operand 1031 states and 3321 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:31,660 INFO L93 Difference]: Finished difference Result 1134 states and 3587 transitions. [2021-07-09 17:29:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:31,663 INFO L225 Difference]: With dead ends: 1134 [2021-07-09 17:29:31,663 INFO L226 Difference]: Without dead ends: 1103 [2021-07-09 17:29:31,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-07-09 17:29:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1046. [2021-07-09 17:29:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.2239234449760765) internal successors, (3369), 1045 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3369 transitions. [2021-07-09 17:29:31,675 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3369 transitions. Word has length 24 [2021-07-09 17:29:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:31,675 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3369 transitions. [2021-07-09 17:29:31,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3369 transitions. [2021-07-09 17:29:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:31,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:31,677 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:31,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-07-09 17:29:31,877 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1479105124, now seen corresponding path program 136 times [2021-07-09 17:29:31,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:31,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221722834] [2021-07-09 17:29:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:32,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221722834] [2021-07-09 17:29:32,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221722834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691705091] [2021-07-09 17:29:32,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:32,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:32,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:32,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:32,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:32,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:32,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:32,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:32,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:32,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:32,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:32,221 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:29:32,369 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:29:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:32,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:32,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:32,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:32,406 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:32,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:32,409 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:32,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:32,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:32,434 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:27 [2021-07-09 17:29:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:32,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691705091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:32,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:29:32,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529778703] [2021-07-09 17:29:32,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:32,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:32,486 INFO L87 Difference]: Start difference. First operand 1046 states and 3369 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:32,864 INFO L93 Difference]: Finished difference Result 1201 states and 3748 transitions. [2021-07-09 17:29:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:32,866 INFO L225 Difference]: With dead ends: 1201 [2021-07-09 17:29:32,866 INFO L226 Difference]: Without dead ends: 1154 [2021-07-09 17:29:32,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-07-09 17:29:32,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1040. [2021-07-09 17:29:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.231953801732435) internal successors, (3358), 1039 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3358 transitions. [2021-07-09 17:29:32,879 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3358 transitions. Word has length 24 [2021-07-09 17:29:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:32,879 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3358 transitions. [2021-07-09 17:29:32,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3358 transitions. [2021-07-09 17:29:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:32,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:32,880 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:33,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1072,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:33,081 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1698401100, now seen corresponding path program 137 times [2021-07-09 17:29:33,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:33,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461168196] [2021-07-09 17:29:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:33,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:33,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461168196] [2021-07-09 17:29:33,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461168196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325050433] [2021-07-09 17:29:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:33,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:33,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:33,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:33,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:33,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:29:33,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:33,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:33,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:33,540 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:33,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:33,544 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:33,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:33,570 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:29:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:33,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325050433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:33,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:33,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573259635] [2021-07-09 17:29:33,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:33,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:33,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:33,623 INFO L87 Difference]: Start difference. First operand 1040 states and 3358 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:34,117 INFO L93 Difference]: Finished difference Result 1162 states and 3663 transitions. [2021-07-09 17:29:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:34,119 INFO L225 Difference]: With dead ends: 1162 [2021-07-09 17:29:34,119 INFO L226 Difference]: Without dead ends: 1099 [2021-07-09 17:29:34,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-09 17:29:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1039. [2021-07-09 17:29:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 3.2235067437379574) internal successors, (3346), 1038 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3346 transitions. [2021-07-09 17:29:34,132 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3346 transitions. Word has length 24 [2021-07-09 17:29:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:34,132 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 3346 transitions. [2021-07-09 17:29:34,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3346 transitions. [2021-07-09 17:29:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:34,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:34,133 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:34,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-07-09 17:29:34,334 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash -335235380, now seen corresponding path program 138 times [2021-07-09 17:29:34,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:34,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138913554] [2021-07-09 17:29:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:34,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:34,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138913554] [2021-07-09 17:29:34,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138913554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40043558] [2021-07-09 17:29:34,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:34,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:29:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:34,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:34,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:34,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:34,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:34,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:34,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:34,706 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:29:34,884 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:29:34,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:34,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:34,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:34,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:34,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,980 INFO L628 ElimStorePlain]: treesize reduction 102, result has 41.0 percent of original size [2021-07-09 17:29:34,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:34,984 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:35,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:35,016 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:197, output treesize:34 [2021-07-09 17:29:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40043558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:35,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:35,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:35,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420458799] [2021-07-09 17:29:35,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:35,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:35,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:35,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:35,089 INFO L87 Difference]: Start difference. First operand 1039 states and 3346 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:35,425 INFO L93 Difference]: Finished difference Result 1244 states and 3866 transitions. [2021-07-09 17:29:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:35,428 INFO L225 Difference]: With dead ends: 1244 [2021-07-09 17:29:35,428 INFO L226 Difference]: Without dead ends: 1153 [2021-07-09 17:29:35,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-07-09 17:29:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1033. [2021-07-09 17:29:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.2248062015503876) internal successors, (3328), 1032 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3328 transitions. [2021-07-09 17:29:35,440 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3328 transitions. Word has length 24 [2021-07-09 17:29:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:35,440 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3328 transitions. [2021-07-09 17:29:35,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3328 transitions. [2021-07-09 17:29:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:35,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:35,442 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:35,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:35,642 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash -509127550, now seen corresponding path program 139 times [2021-07-09 17:29:35,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:35,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930517868] [2021-07-09 17:29:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:35,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930517868] [2021-07-09 17:29:35,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930517868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858008796] [2021-07-09 17:29:35,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:35,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:35,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:35,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:35,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:35,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:35,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:35,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:35,975 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:29:36,084 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-07-09 17:29:36,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:36,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:36,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:36,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:36,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:36,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:36,165 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:36,170 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:36,175 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:36,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:36,179 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:36,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:36,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:36,236 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-07-09 17:29:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:36,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858008796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:36,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:29:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916152812] [2021-07-09 17:29:36,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:36,338 INFO L87 Difference]: Start difference. First operand 1033 states and 3328 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:36,649 INFO L93 Difference]: Finished difference Result 1209 states and 3801 transitions. [2021-07-09 17:29:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:36,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:36,651 INFO L225 Difference]: With dead ends: 1209 [2021-07-09 17:29:36,651 INFO L226 Difference]: Without dead ends: 1162 [2021-07-09 17:29:36,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-07-09 17:29:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1040. [2021-07-09 17:29:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.236766121270452) internal successors, (3363), 1039 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3363 transitions. [2021-07-09 17:29:36,663 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3363 transitions. Word has length 24 [2021-07-09 17:29:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:36,663 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3363 transitions. [2021-07-09 17:29:36,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3363 transitions. [2021-07-09 17:29:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:36,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:36,665 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:36,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,865 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:36,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1389401086, now seen corresponding path program 140 times [2021-07-09 17:29:36,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:36,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623925681] [2021-07-09 17:29:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:37,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:37,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623925681] [2021-07-09 17:29:37,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623925681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:37,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109342462] [2021-07-09 17:29:37,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:37,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:37,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:37,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:37,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:37,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:37,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:37,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:37,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:37,224 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:29:37,331 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-07-09 17:29:37,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:37,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:37,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:37,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:37,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:37,410 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:37,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:37,417 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:37,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:37,423 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:37,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:37,428 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:37,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:37,486 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-07-09 17:29:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:37,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109342462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:37,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:37,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:29:37,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895608732] [2021-07-09 17:29:37,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:37,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:37,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:37,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:37,590 INFO L87 Difference]: Start difference. First operand 1040 states and 3363 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:37,819 INFO L93 Difference]: Finished difference Result 1184 states and 3736 transitions. [2021-07-09 17:29:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:37,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:37,821 INFO L225 Difference]: With dead ends: 1184 [2021-07-09 17:29:37,821 INFO L226 Difference]: Without dead ends: 1165 [2021-07-09 17:29:37,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-07-09 17:29:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1033. [2021-07-09 17:29:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.2248062015503876) internal successors, (3328), 1032 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3328 transitions. [2021-07-09 17:29:37,833 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3328 transitions. Word has length 24 [2021-07-09 17:29:37,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:37,833 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3328 transitions. [2021-07-09 17:29:37,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3328 transitions. [2021-07-09 17:29:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:37,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:37,835 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:38,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1102,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:38,035 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash 324643820, now seen corresponding path program 141 times [2021-07-09 17:29:38,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:38,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052588571] [2021-07-09 17:29:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:38,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:38,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052588571] [2021-07-09 17:29:38,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052588571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78100122] [2021-07-09 17:29:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:38,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:38,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:38,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:38,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:38,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:38,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:38,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:38,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:38,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-07-09 17:29:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:38,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:38,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:38,491 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:38,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:38,495 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:38,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:38,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:38,521 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-07-09 17:29:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:38,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78100122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:38,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:38,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653260825] [2021-07-09 17:29:38,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:38,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:38,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:38,591 INFO L87 Difference]: Start difference. First operand 1033 states and 3328 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:39,010 INFO L93 Difference]: Finished difference Result 1101 states and 3501 transitions. [2021-07-09 17:29:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:39,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:39,012 INFO L225 Difference]: With dead ends: 1101 [2021-07-09 17:29:39,012 INFO L226 Difference]: Without dead ends: 1062 [2021-07-09 17:29:39,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-07-09 17:29:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1036. [2021-07-09 17:29:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.22512077294686) internal successors, (3338), 1035 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3338 transitions. [2021-07-09 17:29:39,024 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3338 transitions. Word has length 24 [2021-07-09 17:29:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:39,024 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3338 transitions. [2021-07-09 17:29:39,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3338 transitions. [2021-07-09 17:29:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:39,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:39,025 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:39,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-07-09 17:29:39,226 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1643686646, now seen corresponding path program 142 times [2021-07-09 17:29:39,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:39,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758851114] [2021-07-09 17:29:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:39,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:39,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758851114] [2021-07-09 17:29:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758851114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472094150] [2021-07-09 17:29:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:39,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:39,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:39,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:39,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:39,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:39,585 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-07-09 17:29:39,741 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-07-09 17:29:39,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:39,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:39,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:39,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:39,776 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:39,780 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,965 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-07-09 17:29:39,965 INFO L628 ElimStorePlain]: treesize reduction 167, result has 53.5 percent of original size [2021-07-09 17:29:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:39,970 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:39,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:39,975 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:39,980 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:40,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:40,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:40,060 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-07-09 17:29:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:40,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472094150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:40,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:40,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:40,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150084670] [2021-07-09 17:29:40,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:40,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:40,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:40,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:40,207 INFO L87 Difference]: Start difference. First operand 1036 states and 3338 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:40,688 INFO L93 Difference]: Finished difference Result 1268 states and 3956 transitions. [2021-07-09 17:29:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:29:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:40,690 INFO L225 Difference]: With dead ends: 1268 [2021-07-09 17:29:40,690 INFO L226 Difference]: Without dead ends: 1172 [2021-07-09 17:29:40,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-07-09 17:29:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1045. [2021-07-09 17:29:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.235632183908046) internal successors, (3378), 1044 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3378 transitions. [2021-07-09 17:29:40,702 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3378 transitions. Word has length 24 [2021-07-09 17:29:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:40,702 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3378 transitions. [2021-07-09 17:29:40,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3378 transitions. [2021-07-09 17:29:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:40,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:40,703 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:40,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-07-09 17:29:40,904 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:40,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1771007114, now seen corresponding path program 143 times [2021-07-09 17:29:40,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:40,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122395493] [2021-07-09 17:29:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:41,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:41,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122395493] [2021-07-09 17:29:41,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122395493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66109685] [2021-07-09 17:29:41,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:41,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:41,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:41,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:41,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:41,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:41,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:41,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-07-09 17:29:41,233 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:29:41,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:41,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:41,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:41,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:41,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:41,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:41,315 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:41,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:41,319 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:41,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:41,324 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:41,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:41,328 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:41,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:41,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:41,392 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-07-09 17:29:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:41,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66109685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:41,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793989311] [2021-07-09 17:29:41,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:41,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:41,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:41,509 INFO L87 Difference]: Start difference. First operand 1045 states and 3378 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:42,213 INFO L93 Difference]: Finished difference Result 1398 states and 4313 transitions. [2021-07-09 17:29:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:42,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:42,215 INFO L225 Difference]: With dead ends: 1398 [2021-07-09 17:29:42,215 INFO L226 Difference]: Without dead ends: 1302 [2021-07-09 17:29:42,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-07-09 17:29:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1033. [2021-07-09 17:29:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.2248062015503876) internal successors, (3328), 1032 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3328 transitions. [2021-07-09 17:29:42,229 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3328 transitions. Word has length 24 [2021-07-09 17:29:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:42,229 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3328 transitions. [2021-07-09 17:29:42,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3328 transitions. [2021-07-09 17:29:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:42,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:42,231 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:42,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-07-09 17:29:42,445 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:42,445 INFO L82 PathProgramCache]: Analyzing trace with hash 545296860, now seen corresponding path program 144 times [2021-07-09 17:29:42,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:42,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928391568] [2021-07-09 17:29:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:42,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928391568] [2021-07-09 17:29:42,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928391568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562456497] [2021-07-09 17:29:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:42,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:42,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:42,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:42,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:42,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:29:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:42,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:42,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:42,933 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:42,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:42,936 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:42,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:42,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-07-09 17:29:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:43,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562456497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:43,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:43,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938128738] [2021-07-09 17:29:43,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:43,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:43,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:43,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:43,005 INFO L87 Difference]: Start difference. First operand 1033 states and 3328 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:43,650 INFO L93 Difference]: Finished difference Result 1197 states and 3795 transitions. [2021-07-09 17:29:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:43,652 INFO L225 Difference]: With dead ends: 1197 [2021-07-09 17:29:43,652 INFO L226 Difference]: Without dead ends: 1126 [2021-07-09 17:29:43,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-07-09 17:29:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1050. [2021-07-09 17:29:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.234509056244042) internal successors, (3393), 1049 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3393 transitions. [2021-07-09 17:29:43,665 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3393 transitions. Word has length 24 [2021-07-09 17:29:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:43,665 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 3393 transitions. [2021-07-09 17:29:43,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3393 transitions. [2021-07-09 17:29:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:43,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:43,667 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:43,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,867 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:43,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:43,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1192674956, now seen corresponding path program 145 times [2021-07-09 17:29:43,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:43,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709693072] [2021-07-09 17:29:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:44,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709693072] [2021-07-09 17:29:44,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709693072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818064760] [2021-07-09 17:29:44,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:44,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:44,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:44,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:44,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:44,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:44,241 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:29:44,385 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:29:44,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:44,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:44,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:44,418 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:44,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:44,422 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:44,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:44,443 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:79, output treesize:27 [2021-07-09 17:29:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:44,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818064760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:44,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:29:44,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484586328] [2021-07-09 17:29:44,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:44,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:44,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:44,493 INFO L87 Difference]: Start difference. First operand 1050 states and 3393 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:44,776 INFO L93 Difference]: Finished difference Result 1214 states and 3781 transitions. [2021-07-09 17:29:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:29:44,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:44,778 INFO L225 Difference]: With dead ends: 1214 [2021-07-09 17:29:44,779 INFO L226 Difference]: Without dead ends: 1167 [2021-07-09 17:29:44,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-09 17:29:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1054. [2021-07-09 17:29:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 3.235517568850902) internal successors, (3407), 1053 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3407 transitions. [2021-07-09 17:29:44,791 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3407 transitions. Word has length 24 [2021-07-09 17:29:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:44,791 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3407 transitions. [2021-07-09 17:29:44,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3407 transitions. [2021-07-09 17:29:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:44,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:44,792 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:44,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:44,993 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1287951836, now seen corresponding path program 146 times [2021-07-09 17:29:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:44,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271154580] [2021-07-09 17:29:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:45,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:45,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271154580] [2021-07-09 17:29:45,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271154580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:45,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962350383] [2021-07-09 17:29:45,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:45,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:45,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:45,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:45,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:45,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:45,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:29:45,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:45,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:45,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:45,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:45,449 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:45,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:45,452 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:45,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:45,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:45,478 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-07-09 17:29:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:45,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962350383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:45,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:45,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:45,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676517535] [2021-07-09 17:29:45,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:45,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:45,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:45,557 INFO L87 Difference]: Start difference. First operand 1054 states and 3407 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:46,052 INFO L93 Difference]: Finished difference Result 1319 states and 4084 transitions. [2021-07-09 17:29:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:46,054 INFO L225 Difference]: With dead ends: 1319 [2021-07-09 17:29:46,054 INFO L226 Difference]: Without dead ends: 1261 [2021-07-09 17:29:46,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 522.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-09 17:29:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1053. [2021-07-09 17:29:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.2347908745247147) internal successors, (3403), 1052 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3403 transitions. [2021-07-09 17:29:46,067 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3403 transitions. Word has length 24 [2021-07-09 17:29:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:46,067 INFO L482 AbstractCegarLoop]: Abstraction has 1053 states and 3403 transitions. [2021-07-09 17:29:46,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3403 transitions. [2021-07-09 17:29:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:46,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:46,069 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:46,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-07-09 17:29:46,269 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1114059666, now seen corresponding path program 147 times [2021-07-09 17:29:46,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:46,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043861822] [2021-07-09 17:29:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:46,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:46,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043861822] [2021-07-09 17:29:46,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043861822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:46,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787460865] [2021-07-09 17:29:46,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:46,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:46,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:46,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:46,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:46,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:29:46,691 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:29:46,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:46,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:46,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:46,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:46,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:46,767 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:46,782 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:46,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:46,786 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:46,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:46,791 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:46,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:46,842 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:69 [2021-07-09 17:29:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:46,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787460865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:46,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:46,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:46,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160298124] [2021-07-09 17:29:46,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:46,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:46,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:46,991 INFO L87 Difference]: Start difference. First operand 1053 states and 3403 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:47,523 INFO L93 Difference]: Finished difference Result 1462 states and 4481 transitions. [2021-07-09 17:29:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:47,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:47,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:47,526 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:29:47,526 INFO L226 Difference]: Without dead ends: 1369 [2021-07-09 17:29:47,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 645.8ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-09 17:29:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1052. [2021-07-09 17:29:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.2340627973358704) internal successors, (3399), 1051 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3399 transitions. [2021-07-09 17:29:47,540 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3399 transitions. Word has length 24 [2021-07-09 17:29:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:47,540 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 3399 transitions. [2021-07-09 17:29:47,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3399 transitions. [2021-07-09 17:29:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:47,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:47,542 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:47,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-07-09 17:29:47,742 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1295739212, now seen corresponding path program 148 times [2021-07-09 17:29:47,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:47,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442369613] [2021-07-09 17:29:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:47,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:47,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442369613] [2021-07-09 17:29:47,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442369613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:47,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906233957] [2021-07-09 17:29:47,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:47,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:47,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:47,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:48,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:48,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:48,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:48,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:48,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:29:48,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:48,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:48,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:29:48,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:48,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2021-07-09 17:29:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:29:48,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906233957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:48,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:48,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:48,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855088520] [2021-07-09 17:29:48,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:48,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:48,222 INFO L87 Difference]: Start difference. First operand 1052 states and 3399 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:48,534 INFO L93 Difference]: Finished difference Result 1141 states and 3655 transitions. [2021-07-09 17:29:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:48,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:48,536 INFO L225 Difference]: With dead ends: 1141 [2021-07-09 17:29:48,536 INFO L226 Difference]: Without dead ends: 1122 [2021-07-09 17:29:48,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-07-09 17:29:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1054. [2021-07-09 17:29:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 3.2326685660018994) internal successors, (3404), 1053 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3404 transitions. [2021-07-09 17:29:48,549 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3404 transitions. Word has length 24 [2021-07-09 17:29:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:48,549 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3404 transitions. [2021-07-09 17:29:48,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3404 transitions. [2021-07-09 17:29:48,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:48,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:48,550 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:48,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-07-09 17:29:48,767 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:48,767 INFO L82 PathProgramCache]: Analyzing trace with hash 136438058, now seen corresponding path program 149 times [2021-07-09 17:29:48,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:48,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185414189] [2021-07-09 17:29:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:48,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:48,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185414189] [2021-07-09 17:29:48,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185414189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:48,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457857386] [2021-07-09 17:29:48,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:48,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:49,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:49,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:49,060 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:29:49,157 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:29:49,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:49,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:49,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:49,194 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:49,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:49,198 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:49,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:49,222 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-07-09 17:29:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:49,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457857386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:49,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:49,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539649573] [2021-07-09 17:29:49,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:49,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:49,308 INFO L87 Difference]: Start difference. First operand 1054 states and 3404 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:49,535 INFO L93 Difference]: Finished difference Result 1171 states and 3734 transitions. [2021-07-09 17:29:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:49,538 INFO L225 Difference]: With dead ends: 1171 [2021-07-09 17:29:49,538 INFO L226 Difference]: Without dead ends: 1140 [2021-07-09 17:29:49,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-07-09 17:29:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1041. [2021-07-09 17:29:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 3.223076923076923) internal successors, (3352), 1040 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 3352 transitions. [2021-07-09 17:29:49,550 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 3352 transitions. Word has length 24 [2021-07-09 17:29:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:49,550 INFO L482 AbstractCegarLoop]: Abstraction has 1041 states and 3352 transitions. [2021-07-09 17:29:49,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 3352 transitions. [2021-07-09 17:29:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:49,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:49,551 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:49,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1180 [2021-07-09 17:29:49,752 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:49,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:49,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1617414260, now seen corresponding path program 150 times [2021-07-09 17:29:49,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:49,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310186325] [2021-07-09 17:29:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:49,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310186325] [2021-07-09 17:29:49,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310186325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550072822] [2021-07-09 17:29:49,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:49,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:50,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:50,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:50,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:50,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-07-09 17:29:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:50,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:50,186 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:50,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:50,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:50,248 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:50,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:50,275 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-07-09 17:29:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:50,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550072822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:50,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:29:50,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578585953] [2021-07-09 17:29:50,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:50,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:50,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:50,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:50,352 INFO L87 Difference]: Start difference. First operand 1041 states and 3352 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:50,672 INFO L93 Difference]: Finished difference Result 1180 states and 3737 transitions. [2021-07-09 17:29:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:50,675 INFO L225 Difference]: With dead ends: 1180 [2021-07-09 17:29:50,675 INFO L226 Difference]: Without dead ends: 1118 [2021-07-09 17:29:50,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-07-09 17:29:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1034. [2021-07-09 17:29:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.22458857696031) internal successors, (3331), 1033 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3331 transitions. [2021-07-09 17:29:50,687 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3331 transitions. Word has length 24 [2021-07-09 17:29:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:50,687 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3331 transitions. [2021-07-09 17:29:50,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3331 transitions. [2021-07-09 17:29:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:50,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:50,688 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:50,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-07-09 17:29:50,889 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2046348534, now seen corresponding path program 151 times [2021-07-09 17:29:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:50,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593776463] [2021-07-09 17:29:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:51,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593776463] [2021-07-09 17:29:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593776463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396282756] [2021-07-09 17:29:51,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:51,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:51,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:51,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:51,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:51,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:51,263 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:29:51,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:51,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:51,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,564 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-09 17:29:51,564 INFO L628 ElimStorePlain]: treesize reduction 155, result has 55.3 percent of original size [2021-07-09 17:29:51,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:51,570 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:51,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:29:51,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,722 INFO L518 ElimStorePlain]: Eliminatee v_prenex_572 vanished before elimination [2021-07-09 17:29:51,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:51,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:51,821 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:51,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:51,896 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:29:51,899 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:51,968 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:52,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:52,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:52,031 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-07-09 17:29:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:52,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396282756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:52,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:52,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097056199] [2021-07-09 17:29:52,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:52,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:52,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:52,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:52,183 INFO L87 Difference]: Start difference. First operand 1034 states and 3331 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,797 INFO L93 Difference]: Finished difference Result 1450 states and 4515 transitions. [2021-07-09 17:29:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:29:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,799 INFO L225 Difference]: With dead ends: 1450 [2021-07-09 17:29:52,799 INFO L226 Difference]: Without dead ends: 1370 [2021-07-09 17:29:52,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-07-09 17:29:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1048. [2021-07-09 17:29:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 3.235912129894938) internal successors, (3388), 1047 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3388 transitions. [2021-07-09 17:29:52,813 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3388 transitions. Word has length 24 [2021-07-09 17:29:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,813 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 3388 transitions. [2021-07-09 17:29:52,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3388 transitions. [2021-07-09 17:29:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:52,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,815 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:53,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,015 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash -95261484, now seen corresponding path program 152 times [2021-07-09 17:29:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:53,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028650374] [2021-07-09 17:29:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:53,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:53,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028650374] [2021-07-09 17:29:53,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028650374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097800898] [2021-07-09 17:29:53,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:53,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:53,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:53,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:53,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:53,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:53,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:29:53,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:53,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:53,506 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:53,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:53,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:53,624 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:53,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:53,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:53,727 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:53,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:53,784 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:53,831 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:53,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:53,874 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:29:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:53,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097800898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:53,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:53,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972456638] [2021-07-09 17:29:53,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:53,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:53,995 INFO L87 Difference]: Start difference. First operand 1048 states and 3388 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,627 INFO L93 Difference]: Finished difference Result 1462 states and 4507 transitions. [2021-07-09 17:29:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:29:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,630 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:29:54,630 INFO L226 Difference]: Without dead ends: 1400 [2021-07-09 17:29:54,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-09 17:29:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1053. [2021-07-09 17:29:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.2395437262357416) internal successors, (3408), 1052 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3408 transitions. [2021-07-09 17:29:54,644 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3408 transitions. Word has length 24 [2021-07-09 17:29:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,644 INFO L482 AbstractCegarLoop]: Abstraction has 1053 states and 3408 transitions. [2021-07-09 17:29:54,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3408 transitions. [2021-07-09 17:29:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:54,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,652 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:54,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1203,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,852 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:54,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1272144164, now seen corresponding path program 153 times [2021-07-09 17:29:54,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:54,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891397365] [2021-07-09 17:29:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:55,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:55,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891397365] [2021-07-09 17:29:55,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891397365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302975092] [2021-07-09 17:29:55,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:55,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:55,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:55,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:55,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:55,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:55,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:55,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:55,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:55,172 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:29:55,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:55,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:55,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:55,349 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:55,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:55,372 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:55,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:55,392 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:29:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:55,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302975092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:55,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:55,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452966907] [2021-07-09 17:29:55,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:55,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:55,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:55,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:55,483 INFO L87 Difference]: Start difference. First operand 1053 states and 3408 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:55,835 INFO L93 Difference]: Finished difference Result 1299 states and 4083 transitions. [2021-07-09 17:29:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:55,837 INFO L225 Difference]: With dead ends: 1299 [2021-07-09 17:29:55,837 INFO L226 Difference]: Without dead ends: 1237 [2021-07-09 17:29:55,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-07-09 17:29:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1034. [2021-07-09 17:29:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.22458857696031) internal successors, (3331), 1033 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3331 transitions. [2021-07-09 17:29:55,850 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3331 transitions. Word has length 24 [2021-07-09 17:29:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:55,850 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3331 transitions. [2021-07-09 17:29:55,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3331 transitions. [2021-07-09 17:29:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:55,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:55,851 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:56,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-07-09 17:29:56,052 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:56,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1136237428, now seen corresponding path program 154 times [2021-07-09 17:29:56,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:56,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3354514] [2021-07-09 17:29:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:56,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:56,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3354514] [2021-07-09 17:29:56,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3354514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252801549] [2021-07-09 17:29:56,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:56,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:56,535 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:29:56,717 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:29:56,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:56,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:56,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,832 INFO L628 ElimStorePlain]: treesize reduction 60, result has 65.3 percent of original size [2021-07-09 17:29:56,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:56,837 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:56,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:56,840 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:56,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:29:56,885 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:53 [2021-07-09 17:29:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:56,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252801549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:56,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:56,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153826365] [2021-07-09 17:29:56,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:56,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:56,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:56,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:56,968 INFO L87 Difference]: Start difference. First operand 1034 states and 3331 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:57,390 INFO L93 Difference]: Finished difference Result 1141 states and 3640 transitions. [2021-07-09 17:29:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:57,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:57,392 INFO L225 Difference]: With dead ends: 1141 [2021-07-09 17:29:57,392 INFO L226 Difference]: Without dead ends: 1088 [2021-07-09 17:29:57,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-07-09 17:29:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1040. [2021-07-09 17:29:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.2242540904716073) internal successors, (3350), 1039 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3350 transitions. [2021-07-09 17:29:57,404 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3350 transitions. Word has length 24 [2021-07-09 17:29:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:57,404 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3350 transitions. [2021-07-09 17:29:57,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3350 transitions. [2021-07-09 17:29:57,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:57,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:57,405 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:57,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1219 [2021-07-09 17:29:57,606 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -832093038, now seen corresponding path program 155 times [2021-07-09 17:29:57,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:57,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299186463] [2021-07-09 17:29:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:57,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:57,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299186463] [2021-07-09 17:29:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299186463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723484660] [2021-07-09 17:29:57,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:57,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:57,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:57,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:57,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:57,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:57,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:57,966 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-07-09 17:29:58,032 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:29:58,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:58,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:58,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:58,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:58,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:58,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:58,120 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:58,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:58,124 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:58,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:58,129 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:58,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:58,134 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:58,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:58,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:58,198 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-07-09 17:29:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:58,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723484660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:58,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194811785] [2021-07-09 17:29:58,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:58,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:58,320 INFO L87 Difference]: Start difference. First operand 1040 states and 3350 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:58,961 INFO L93 Difference]: Finished difference Result 1239 states and 3852 transitions. [2021-07-09 17:29:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:29:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:58,963 INFO L225 Difference]: With dead ends: 1239 [2021-07-09 17:29:58,963 INFO L226 Difference]: Without dead ends: 1177 [2021-07-09 17:29:58,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-07-09 17:29:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1043. [2021-07-09 17:29:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 3.224568138195777) internal successors, (3360), 1042 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 3360 transitions. [2021-07-09 17:29:58,975 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 3360 transitions. Word has length 24 [2021-07-09 17:29:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:58,975 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 3360 transitions. [2021-07-09 17:29:58,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 3360 transitions. [2021-07-09 17:29:58,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:29:58,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:58,977 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,177 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash 977292628, now seen corresponding path program 156 times [2021-07-09 17:29:59,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277243822] [2021-07-09 17:29:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:59,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277243822] [2021-07-09 17:29:59,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277243822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946860077] [2021-07-09 17:29:59,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:59,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:59,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:59,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:29:59,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:29:59,642 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:29:59,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:59,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:59,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:59,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:59,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:59,736 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:59,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:29:59,745 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:59,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:59,750 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:59,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:59,756 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:59,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:59,827 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-07-09 17:29:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:29:59,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946860077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:59,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:29:59,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147041737] [2021-07-09 17:29:59,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:59,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:59,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:59,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:59,958 INFO L87 Difference]: Start difference. First operand 1043 states and 3360 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:00,223 INFO L93 Difference]: Finished difference Result 1180 states and 3728 transitions. [2021-07-09 17:30:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:00,225 INFO L225 Difference]: With dead ends: 1180 [2021-07-09 17:30:00,225 INFO L226 Difference]: Without dead ends: 1118 [2021-07-09 17:30:00,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-07-09 17:30:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1038. [2021-07-09 17:30:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 3.2256509161041467) internal successors, (3345), 1037 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3345 transitions. [2021-07-09 17:30:00,237 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3345 transitions. Word has length 24 [2021-07-09 17:30:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:00,237 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 3345 transitions. [2021-07-09 17:30:00,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3345 transitions. [2021-07-09 17:30:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:00,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:00,239 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:00,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-07-09 17:30:00,439 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:00,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:00,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1437025154, now seen corresponding path program 157 times [2021-07-09 17:30:00,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:00,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529566168] [2021-07-09 17:30:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:00,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529566168] [2021-07-09 17:30:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529566168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73281097] [2021-07-09 17:30:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:00,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:00,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:00,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:00,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:00,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:00,837 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:00,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:00,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:00,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:01,050 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:01,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:01,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:01,163 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:01,214 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:01,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:01,270 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:01,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:01,321 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:01,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:01,369 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:30:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:01,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73281097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:01,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:01,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427900600] [2021-07-09 17:30:01,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:01,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:01,565 INFO L87 Difference]: Start difference. First operand 1038 states and 3345 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,164 INFO L93 Difference]: Finished difference Result 1358 states and 4232 transitions. [2021-07-09 17:30:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:02,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,167 INFO L225 Difference]: With dead ends: 1358 [2021-07-09 17:30:02,167 INFO L226 Difference]: Without dead ends: 1265 [2021-07-09 17:30:02,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 756.2ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-09 17:30:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1049. [2021-07-09 17:30:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.236641221374046) internal successors, (3392), 1048 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3392 transitions. [2021-07-09 17:30:02,182 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3392 transitions. Word has length 24 [2021-07-09 17:30:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,182 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 3392 transitions. [2021-07-09 17:30:02,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3392 transitions. [2021-07-09 17:30:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:02,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,183 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-07-09 17:30:02,384 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2083737772, now seen corresponding path program 158 times [2021-07-09 17:30:02,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456377525] [2021-07-09 17:30:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:02,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:02,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456377525] [2021-07-09 17:30:02,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456377525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584167749] [2021-07-09 17:30:02,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:02,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:02,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:02,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:02,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:02,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:02,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:02,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:02,809 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:02,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:02,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:02,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:02,974 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:02,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:03,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:03,024 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:03,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:03,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:30:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:03,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584167749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:03,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:03,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065645654] [2021-07-09 17:30:03,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:03,134 INFO L87 Difference]: Start difference. First operand 1049 states and 3392 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:03,362 INFO L93 Difference]: Finished difference Result 1198 states and 3799 transitions. [2021-07-09 17:30:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:03,364 INFO L225 Difference]: With dead ends: 1198 [2021-07-09 17:30:03,364 INFO L226 Difference]: Without dead ends: 1136 [2021-07-09 17:30:03,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-07-09 17:30:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1036. [2021-07-09 17:30:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.2270531400966185) internal successors, (3340), 1035 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3340 transitions. [2021-07-09 17:30:03,378 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3340 transitions. Word has length 24 [2021-07-09 17:30:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:03,378 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3340 transitions. [2021-07-09 17:30:03,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3340 transitions. [2021-07-09 17:30:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:03,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:03,379 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:03,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:03,593 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash -522906514, now seen corresponding path program 159 times [2021-07-09 17:30:03,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:03,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221893501] [2021-07-09 17:30:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:03,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:03,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221893501] [2021-07-09 17:30:03,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221893501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132473939] [2021-07-09 17:30:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:03,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:03,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:03,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:03,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:03,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:04,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:04,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:04,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:04,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:04,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:30:04,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:30:04,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:04,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:04,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:04,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:04,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:04,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:04,232 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:04,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:04,236 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:04,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:04,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:04,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-07-09 17:30:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:04,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132473939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:04,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:04,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36148651] [2021-07-09 17:30:04,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:04,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:04,314 INFO L87 Difference]: Start difference. First operand 1036 states and 3340 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:05,284 INFO L93 Difference]: Finished difference Result 1313 states and 4108 transitions. [2021-07-09 17:30:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:05,287 INFO L225 Difference]: With dead ends: 1313 [2021-07-09 17:30:05,287 INFO L226 Difference]: Without dead ends: 1227 [2021-07-09 17:30:05,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 961.2ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-09 17:30:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1064. [2021-07-09 17:30:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.2276575729068675) internal successors, (3431), 1063 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3431 transitions. [2021-07-09 17:30:05,299 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3431 transitions. Word has length 24 [2021-07-09 17:30:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:05,299 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3431 transitions. [2021-07-09 17:30:05,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3431 transitions. [2021-07-09 17:30:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:05,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:05,301 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:05,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:05,502 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:05,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:05,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2034088966, now seen corresponding path program 160 times [2021-07-09 17:30:05,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:05,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386444379] [2021-07-09 17:30:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:05,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:05,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386444379] [2021-07-09 17:30:05,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386444379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619298197] [2021-07-09 17:30:05,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:05,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:05,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:05,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:05,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:05,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:05,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:05,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:05,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:05,909 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:30:06,096 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:30:06,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:06,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:06,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:06,140 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:06,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:06,144 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:06,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:06,181 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:79, output treesize:27 [2021-07-09 17:30:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:06,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619298197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:06,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:30:06,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628259214] [2021-07-09 17:30:06,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:06,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:06,233 INFO L87 Difference]: Start difference. First operand 1064 states and 3431 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,472 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:30:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:06,873 INFO L93 Difference]: Finished difference Result 1306 states and 4057 transitions. [2021-07-09 17:30:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:06,876 INFO L225 Difference]: With dead ends: 1306 [2021-07-09 17:30:06,876 INFO L226 Difference]: Without dead ends: 1259 [2021-07-09 17:30:06,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-07-09 17:30:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1060. [2021-07-09 17:30:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 3.2341831916902737) internal successors, (3425), 1059 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 3425 transitions. [2021-07-09 17:30:06,889 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 3425 transitions. Word has length 24 [2021-07-09 17:30:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:06,889 INFO L482 AbstractCegarLoop]: Abstraction has 1060 states and 3425 transitions. [2021-07-09 17:30:06,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 3425 transitions. [2021-07-09 17:30:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:06,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:06,890 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:07,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,091 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2041582354, now seen corresponding path program 161 times [2021-07-09 17:30:07,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:07,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555867586] [2021-07-09 17:30:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:07,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555867586] [2021-07-09 17:30:07,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555867586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919868838] [2021-07-09 17:30:07,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:30:07,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:07,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:07,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:07,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:07,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:07,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:30:07,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:07,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:07,695 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:07,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2021-07-09 17:30:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:07,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919868838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:07,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417126581] [2021-07-09 17:30:07,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:07,742 INFO L87 Difference]: Start difference. First operand 1060 states and 3425 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,941 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:30:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:08,459 INFO L93 Difference]: Finished difference Result 1345 states and 4205 transitions. [2021-07-09 17:30:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:08,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:08,461 INFO L225 Difference]: With dead ends: 1345 [2021-07-09 17:30:08,461 INFO L226 Difference]: Without dead ends: 1307 [2021-07-09 17:30:08,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 783.6ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-07-09 17:30:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1064. [2021-07-09 17:30:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.237064910630292) internal successors, (3441), 1063 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3441 transitions. [2021-07-09 17:30:08,475 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3441 transitions. Word has length 24 [2021-07-09 17:30:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:08,475 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3441 transitions. [2021-07-09 17:30:08,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3441 transitions. [2021-07-09 17:30:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:08,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:08,476 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:08,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1282,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,677 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:08,677 INFO L82 PathProgramCache]: Analyzing trace with hash 219748462, now seen corresponding path program 162 times [2021-07-09 17:30:08,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:08,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312671868] [2021-07-09 17:30:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:08,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312671868] [2021-07-09 17:30:08,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312671868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827430518] [2021-07-09 17:30:08,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:08,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:09,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:09,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:09,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:09,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:09,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:30:09,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-07-09 17:30:09,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:09,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:09,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:09,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:09,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:09,298 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:09,302 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:09,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:09,328 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-07-09 17:30:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827430518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:09,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:30:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681714670] [2021-07-09 17:30:09,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:09,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:09,424 INFO L87 Difference]: Start difference. First operand 1064 states and 3441 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:10,084 INFO L93 Difference]: Finished difference Result 1395 states and 4347 transitions. [2021-07-09 17:30:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:10,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:10,087 INFO L225 Difference]: With dead ends: 1395 [2021-07-09 17:30:10,087 INFO L226 Difference]: Without dead ends: 1337 [2021-07-09 17:30:10,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-07-09 17:30:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1066. [2021-07-09 17:30:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 3.2384976525821596) internal successors, (3449), 1065 states have internal predecessors, (3449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 3449 transitions. [2021-07-09 17:30:10,101 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 3449 transitions. Word has length 24 [2021-07-09 17:30:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:10,101 INFO L482 AbstractCegarLoop]: Abstraction has 1066 states and 3449 transitions. [2021-07-09 17:30:10,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 3449 transitions. [2021-07-09 17:30:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:10,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:10,103 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:10,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-07-09 17:30:10,305 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 45856292, now seen corresponding path program 163 times [2021-07-09 17:30:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:10,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27021727] [2021-07-09 17:30:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:10,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:10,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27021727] [2021-07-09 17:30:10,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27021727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584454300] [2021-07-09 17:30:10,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:10,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:10,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:10,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:10,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:10,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:10,704 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:30:10,815 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-07-09 17:30:10,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:10,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:10,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:10,848 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,854 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:10,858 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:11,034 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-07-09 17:30:11,035 INFO L628 ElimStorePlain]: treesize reduction 168, result has 50.1 percent of original size [2021-07-09 17:30:11,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:11,040 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:11,045 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:11,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:11,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:11,125 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-07-09 17:30:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:11,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584454300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:11,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:30:11,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521907619] [2021-07-09 17:30:11,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:11,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:11,270 INFO L87 Difference]: Start difference. First operand 1066 states and 3449 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,509 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:30:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:12,038 INFO L93 Difference]: Finished difference Result 1488 states and 4603 transitions. [2021-07-09 17:30:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:12,041 INFO L225 Difference]: With dead ends: 1488 [2021-07-09 17:30:12,041 INFO L226 Difference]: Without dead ends: 1400 [2021-07-09 17:30:12,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 806.6ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-09 17:30:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1074. [2021-07-09 17:30:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.2534948741845295) internal successors, (3491), 1073 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3491 transitions. [2021-07-09 17:30:12,055 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3491 transitions. Word has length 24 [2021-07-09 17:30:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:12,055 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3491 transitions. [2021-07-09 17:30:12,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3491 transitions. [2021-07-09 17:30:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:12,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:12,057 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:12,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,257 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash -834417244, now seen corresponding path program 164 times [2021-07-09 17:30:12,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:12,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404730436] [2021-07-09 17:30:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:12,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:12,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404730436] [2021-07-09 17:30:12,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404730436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419975947] [2021-07-09 17:30:12,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:12,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:12,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:12,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:12,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:12,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:12,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:12,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:12,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:12,729 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:30:12,841 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-07-09 17:30:12,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:12,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:12,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:12,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:12,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:12,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:12,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:12,918 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:12,923 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:12,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:12,928 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:12,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:12,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:12,932 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:12,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:12,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:12,982 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:173, output treesize:69 [2021-07-09 17:30:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:13,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419975947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:13,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:13,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361134829] [2021-07-09 17:30:13,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:13,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:13,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:13,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:13,104 INFO L87 Difference]: Start difference. First operand 1074 states and 3491 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,358 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-07-09 17:30:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:13,777 INFO L93 Difference]: Finished difference Result 1502 states and 4667 transitions. [2021-07-09 17:30:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:13,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:13,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:13,779 INFO L225 Difference]: With dead ends: 1502 [2021-07-09 17:30:13,779 INFO L226 Difference]: Without dead ends: 1464 [2021-07-09 17:30:13,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-07-09 17:30:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1069. [2021-07-09 17:30:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.247191011235955) internal successors, (3468), 1068 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3468 transitions. [2021-07-09 17:30:13,794 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3468 transitions. Word has length 24 [2021-07-09 17:30:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:13,794 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3468 transitions. [2021-07-09 17:30:13,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3468 transitions. [2021-07-09 17:30:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:13,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:13,795 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:13,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1304 [2021-07-09 17:30:13,996 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash -931765316, now seen corresponding path program 165 times [2021-07-09 17:30:13,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:13,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730049199] [2021-07-09 17:30:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:14,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:14,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730049199] [2021-07-09 17:30:14,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730049199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392799710] [2021-07-09 17:30:14,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:14,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:14,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:14,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:14,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-07-09 17:30:14,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:14,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:14,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:14,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:14,368 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:14,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:14,372 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:14,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:14,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:14,399 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-07-09 17:30:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:14,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392799710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:14,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915289747] [2021-07-09 17:30:14,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:14,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:14,471 INFO L87 Difference]: Start difference. First operand 1069 states and 3468 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:14,908 INFO L93 Difference]: Finished difference Result 1336 states and 4254 transitions. [2021-07-09 17:30:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:14,910 INFO L225 Difference]: With dead ends: 1336 [2021-07-09 17:30:14,910 INFO L226 Difference]: Without dead ends: 1295 [2021-07-09 17:30:14,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-07-09 17:30:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1080. [2021-07-09 17:30:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.249304911955514) internal successors, (3506), 1079 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3506 transitions. [2021-07-09 17:30:14,924 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3506 transitions. Word has length 24 [2021-07-09 17:30:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,924 INFO L482 AbstractCegarLoop]: Abstraction has 1080 states and 3506 transitions. [2021-07-09 17:30:14,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3506 transitions. [2021-07-09 17:30:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:14,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,926 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:15,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1312,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:15,126 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash 549210886, now seen corresponding path program 166 times [2021-07-09 17:30:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:15,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075681766] [2021-07-09 17:30:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:15,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:15,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075681766] [2021-07-09 17:30:15,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075681766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590389271] [2021-07-09 17:30:15,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:15,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:15,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:15,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:15,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:15,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:15,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:15,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:15,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:15,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:30:15,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-07-09 17:30:15,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:15,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:15,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:15,634 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-07-09 17:30:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:15,638 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:15,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:15,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:15,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:15,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:15,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:15,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:15,707 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:15,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:15,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:15,735 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-07-09 17:30:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:15,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590389271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:15,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:15,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201743410] [2021-07-09 17:30:15,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:15,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:15,824 INFO L87 Difference]: Start difference. First operand 1080 states and 3506 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:16,147 INFO L93 Difference]: Finished difference Result 1327 states and 4236 transitions. [2021-07-09 17:30:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:16,150 INFO L225 Difference]: With dead ends: 1327 [2021-07-09 17:30:16,150 INFO L226 Difference]: Without dead ends: 1267 [2021-07-09 17:30:16,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-09 17:30:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1094. [2021-07-09 17:30:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.252516010978957) internal successors, (3555), 1093 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3555 transitions. [2021-07-09 17:30:16,162 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3555 transitions. Word has length 24 [2021-07-09 17:30:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:16,163 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3555 transitions. [2021-07-09 17:30:16,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3555 transitions. [2021-07-09 17:30:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:16,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:16,164 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:16,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-07-09 17:30:16,364 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1180415388, now seen corresponding path program 167 times [2021-07-09 17:30:16,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:16,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801305251] [2021-07-09 17:30:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:16,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801305251] [2021-07-09 17:30:16,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801305251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714580713] [2021-07-09 17:30:16,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:16,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:16,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:16,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:16,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:30:16,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:30:16,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:16,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:16,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:16,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:16,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:16,861 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:16,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:16,869 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:16,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:16,928 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:16,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:16,932 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:16,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:16,978 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-07-09 17:30:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:17,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714580713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:17,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:17,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392151952] [2021-07-09 17:30:17,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:17,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:17,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:17,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:17,100 INFO L87 Difference]: Start difference. First operand 1094 states and 3555 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:17,895 INFO L93 Difference]: Finished difference Result 1552 states and 4855 transitions. [2021-07-09 17:30:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:17,897 INFO L225 Difference]: With dead ends: 1552 [2021-07-09 17:30:17,897 INFO L226 Difference]: Without dead ends: 1486 [2021-07-09 17:30:17,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-07-09 17:30:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1108. [2021-07-09 17:30:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.2628726287262872) internal successors, (3612), 1107 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3612 transitions. [2021-07-09 17:30:17,912 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3612 transitions. Word has length 24 [2021-07-09 17:30:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:17,912 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3612 transitions. [2021-07-09 17:30:17,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3612 transitions. [2021-07-09 17:30:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:17,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:17,914 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:18,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1322,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:18,115 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1163464858, now seen corresponding path program 168 times [2021-07-09 17:30:18,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:18,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634055093] [2021-07-09 17:30:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:18,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:18,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634055093] [2021-07-09 17:30:18,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634055093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646025678] [2021-07-09 17:30:18,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:18,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:18,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:18,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:18,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:18,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:18,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:18,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:18,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:18,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:18,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:18,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:18,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:18,607 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:18,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:18,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:18,749 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:18,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:18,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:18,858 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:18,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:18,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:18,978 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:19,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:19,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:19,024 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:30:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646025678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:19,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153936394] [2021-07-09 17:30:19,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:19,142 INFO L87 Difference]: Start difference. First operand 1108 states and 3612 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:19,950 INFO L93 Difference]: Finished difference Result 1619 states and 4999 transitions. [2021-07-09 17:30:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:19,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:19,954 INFO L225 Difference]: With dead ends: 1619 [2021-07-09 17:30:19,954 INFO L226 Difference]: Without dead ends: 1557 [2021-07-09 17:30:19,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 741.2ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-07-09 17:30:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1113. [2021-07-09 17:30:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 3.2661870503597124) internal successors, (3632), 1112 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3632 transitions. [2021-07-09 17:30:19,988 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3632 transitions. Word has length 24 [2021-07-09 17:30:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:19,988 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3632 transitions. [2021-07-09 17:30:19,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3632 transitions. [2021-07-09 17:30:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:19,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:19,989 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:20,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1329 [2021-07-09 17:30:20,190 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1954619758, now seen corresponding path program 169 times [2021-07-09 17:30:20,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:20,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373903277] [2021-07-09 17:30:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:20,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:20,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373903277] [2021-07-09 17:30:20,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373903277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764656926] [2021-07-09 17:30:20,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:20,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:20,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:20,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:20,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:20,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:20,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:20,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:20,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:20,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:20,530 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:20,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:20,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:20,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:20,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:20,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:20,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:20,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:20,728 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-07-09 17:30:20,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:20,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:20,732 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:20,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:20,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:20,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:20,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:20,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:20,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:20,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:20,793 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:20,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:20,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:20,816 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-07-09 17:30:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:20,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764656926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:20,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:20,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315143134] [2021-07-09 17:30:20,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:20,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:20,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:20,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:20,900 INFO L87 Difference]: Start difference. First operand 1113 states and 3632 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:21,337 INFO L93 Difference]: Finished difference Result 1645 states and 5154 transitions. [2021-07-09 17:30:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:21,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:21,340 INFO L225 Difference]: With dead ends: 1645 [2021-07-09 17:30:21,340 INFO L226 Difference]: Without dead ends: 1529 [2021-07-09 17:30:21,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-07-09 17:30:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1117. [2021-07-09 17:30:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 3.271505376344086) internal successors, (3651), 1116 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3651 transitions. [2021-07-09 17:30:21,355 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3651 transitions. Word has length 24 [2021-07-09 17:30:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:21,355 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3651 transitions. [2021-07-09 17:30:21,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3651 transitions. [2021-07-09 17:30:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:21,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:21,357 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:21,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1336,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,557 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1658960150, now seen corresponding path program 170 times [2021-07-09 17:30:21,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:21,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102234533] [2021-07-09 17:30:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:21,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:21,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102234533] [2021-07-09 17:30:21,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102234533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911664851] [2021-07-09 17:30:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:21,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:30:21,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:30:21,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:21,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:21,834 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:30:21,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:21,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:21,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,976 INFO L628 ElimStorePlain]: treesize reduction 80, result has 40.7 percent of original size [2021-07-09 17:30:21,976 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:30:21,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:21,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:21,997 INFO L518 ElimStorePlain]: Eliminatee v_prenex_656 vanished before elimination [2021-07-09 17:30:21,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:21,997 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:37 [2021-07-09 17:30:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:22,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911664851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:22,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:30:22,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130251681] [2021-07-09 17:30:22,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:22,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:22,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:22,077 INFO L87 Difference]: Start difference. First operand 1117 states and 3651 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:22,374 INFO L93 Difference]: Finished difference Result 1394 states and 4421 transitions. [2021-07-09 17:30:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:22,376 INFO L225 Difference]: With dead ends: 1394 [2021-07-09 17:30:22,376 INFO L226 Difference]: Without dead ends: 1325 [2021-07-09 17:30:22,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-07-09 17:30:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1121. [2021-07-09 17:30:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.2517857142857145) internal successors, (3642), 1120 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3642 transitions. [2021-07-09 17:30:22,390 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3642 transitions. Word has length 24 [2021-07-09 17:30:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:22,390 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3642 transitions. [2021-07-09 17:30:22,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3642 transitions. [2021-07-09 17:30:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:22,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:22,391 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:22,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-07-09 17:30:22,592 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:22,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1932983276, now seen corresponding path program 171 times [2021-07-09 17:30:22,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:22,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338959584] [2021-07-09 17:30:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:22,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338959584] [2021-07-09 17:30:22,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338959584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221071741] [2021-07-09 17:30:22,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:22,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:22,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:22,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:22,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:30:22,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:30:22,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:22,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:30:22,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:22,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,917 INFO L518 ElimStorePlain]: Eliminatee v_prenex_658 vanished before elimination [2021-07-09 17:30:22,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:22,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,939 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:30:22,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:22,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:30:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:23,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221071741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:23,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:30:23,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978662230] [2021-07-09 17:30:23,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:23,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:23,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:23,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:23,049 INFO L87 Difference]: Start difference. First operand 1121 states and 3642 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:23,270 INFO L93 Difference]: Finished difference Result 1407 states and 4431 transitions. [2021-07-09 17:30:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:23,273 INFO L225 Difference]: With dead ends: 1407 [2021-07-09 17:30:23,273 INFO L226 Difference]: Without dead ends: 1345 [2021-07-09 17:30:23,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-07-09 17:30:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1099. [2021-07-09 17:30:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.233151183970856) internal successors, (3550), 1098 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3550 transitions. [2021-07-09 17:30:23,287 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3550 transitions. Word has length 24 [2021-07-09 17:30:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:23,287 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 3550 transitions. [2021-07-09 17:30:23,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3550 transitions. [2021-07-09 17:30:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:23,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:23,288 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:23,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:23,489 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1372052590, now seen corresponding path program 172 times [2021-07-09 17:30:23,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:23,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309841361] [2021-07-09 17:30:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:23,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:23,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309841361] [2021-07-09 17:30:23,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309841361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950079405] [2021-07-09 17:30:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:23,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:23,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:30:23,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:30:23,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:23,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:23,759 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:30:23,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:23,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:23,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:23,855 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:30:23,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:23,856 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-07-09 17:30:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950079405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:23,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:30:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802912370] [2021-07-09 17:30:23,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:23,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:23,947 INFO L87 Difference]: Start difference. First operand 1099 states and 3550 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:24,205 INFO L93 Difference]: Finished difference Result 1534 states and 4838 transitions. [2021-07-09 17:30:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:24,219 INFO L225 Difference]: With dead ends: 1534 [2021-07-09 17:30:24,219 INFO L226 Difference]: Without dead ends: 1472 [2021-07-09 17:30:24,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-07-09 17:30:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1099. [2021-07-09 17:30:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.233151183970856) internal successors, (3550), 1098 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3550 transitions. [2021-07-09 17:30:24,233 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3550 transitions. Word has length 24 [2021-07-09 17:30:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:24,233 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 3550 transitions. [2021-07-09 17:30:24,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3550 transitions. [2021-07-09 17:30:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:24,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:24,235 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:24,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1356 [2021-07-09 17:30:24,436 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:24,436 INFO L82 PathProgramCache]: Analyzing trace with hash -358373054, now seen corresponding path program 173 times [2021-07-09 17:30:24,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:24,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796229225] [2021-07-09 17:30:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:24,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796229225] [2021-07-09 17:30:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796229225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688397833] [2021-07-09 17:30:24,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:24,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:24,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:24,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:24,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:24,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:24,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:30:24,748 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-07-09 17:30:24,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:24,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:24,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:24,902 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:24,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:24,906 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:24,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:24,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:24,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:25,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:25,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:25,021 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:25,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:25,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:25,025 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:25,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:25,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:25,071 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-07-09 17:30:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:25,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688397833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:25,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308727641] [2021-07-09 17:30:25,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:25,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:25,194 INFO L87 Difference]: Start difference. First operand 1099 states and 3550 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,668 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-07-09 17:30:26,369 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-07-09 17:30:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:26,649 INFO L93 Difference]: Finished difference Result 1918 states and 5985 transitions. [2021-07-09 17:30:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:26,653 INFO L225 Difference]: With dead ends: 1918 [2021-07-09 17:30:26,653 INFO L226 Difference]: Without dead ends: 1852 [2021-07-09 17:30:26,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1369.1ms TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-07-09 17:30:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1127. [2021-07-09 17:30:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 3.24955595026643) internal successors, (3659), 1126 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3659 transitions. [2021-07-09 17:30:26,671 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3659 transitions. Word has length 24 [2021-07-09 17:30:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:26,671 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3659 transitions. [2021-07-09 17:30:26,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3659 transitions. [2021-07-09 17:30:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:26,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:26,672 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:26,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-07-09 17:30:26,877 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1241217410, now seen corresponding path program 174 times [2021-07-09 17:30:26,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:26,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137411350] [2021-07-09 17:30:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:27,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:27,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137411350] [2021-07-09 17:30:27,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137411350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170946266] [2021-07-09 17:30:27,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:27,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:27,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:27,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:27,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:27,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:27,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:27,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:27,250 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:27,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:27,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:27,536 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:27,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:27,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:27,664 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:27,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:27,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:27,784 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:27,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:27,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:27,894 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:27,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:27,944 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-07-09 17:30:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:28,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170946266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:28,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:28,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752345685] [2021-07-09 17:30:28,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:28,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:28,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:28,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:28,070 INFO L87 Difference]: Start difference. First operand 1127 states and 3659 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,404 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-07-09 17:30:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:28,973 INFO L93 Difference]: Finished difference Result 1915 states and 5923 transitions. [2021-07-09 17:30:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:28,976 INFO L225 Difference]: With dead ends: 1915 [2021-07-09 17:30:28,976 INFO L226 Difference]: Without dead ends: 1826 [2021-07-09 17:30:28,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 959.7ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:28,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-07-09 17:30:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1124. [2021-07-09 17:30:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.2493321460374) internal successors, (3649), 1123 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3649 transitions. [2021-07-09 17:30:28,993 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3649 transitions. Word has length 24 [2021-07-09 17:30:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:28,993 INFO L482 AbstractCegarLoop]: Abstraction has 1124 states and 3649 transitions. [2021-07-09 17:30:28,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3649 transitions. [2021-07-09 17:30:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:28,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:28,994 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,195 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,195 INFO L82 PathProgramCache]: Analyzing trace with hash 415831316, now seen corresponding path program 175 times [2021-07-09 17:30:29,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797332368] [2021-07-09 17:30:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:29,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797332368] [2021-07-09 17:30:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797332368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528606583] [2021-07-09 17:30:29,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:29,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:29,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:29,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:29,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:29,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:29,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:29,678 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:30:29,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:29,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:29,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:29,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:29,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:29,909 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:29,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:29,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:29,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:29,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:29,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:29,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:29,960 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:29,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:29,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:29,980 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:30:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:30,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528606583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:30,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:30,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987588976] [2021-07-09 17:30:30,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:30,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:30,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:30,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:30,079 INFO L87 Difference]: Start difference. First operand 1124 states and 3649 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:30,618 INFO L93 Difference]: Finished difference Result 1920 states and 5979 transitions. [2021-07-09 17:30:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:30,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:30,621 INFO L225 Difference]: With dead ends: 1920 [2021-07-09 17:30:30,621 INFO L226 Difference]: Without dead ends: 1831 [2021-07-09 17:30:30,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 854.1ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-07-09 17:30:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1127. [2021-07-09 17:30:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 3.2539964476021312) internal successors, (3664), 1126 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3664 transitions. [2021-07-09 17:30:30,637 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3664 transitions. Word has length 24 [2021-07-09 17:30:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:30,637 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3664 transitions. [2021-07-09 17:30:30,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3664 transitions. [2021-07-09 17:30:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:30,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:30,639 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:30,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-07-09 17:30:30,845 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash 253826086, now seen corresponding path program 176 times [2021-07-09 17:30:30,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:30,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711441822] [2021-07-09 17:30:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:31,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:31,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711441822] [2021-07-09 17:30:31,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711441822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996182340] [2021-07-09 17:30:31,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:31,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:31,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:31,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:31,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:31,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:31,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:31,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:31,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:31,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:31,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:31,176 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:30:31,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:31,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:31,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:31,360 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:31,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:31,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:31,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:31,408 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:31,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:31,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:31,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:30:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:31,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996182340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:31,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:31,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518697981] [2021-07-09 17:30:31,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:31,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:31,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:31,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:31,526 INFO L87 Difference]: Start difference. First operand 1127 states and 3664 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:32,175 INFO L93 Difference]: Finished difference Result 2082 states and 6519 transitions. [2021-07-09 17:30:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:32,179 INFO L225 Difference]: With dead ends: 2082 [2021-07-09 17:30:32,179 INFO L226 Difference]: Without dead ends: 2020 [2021-07-09 17:30:32,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-07-09 17:30:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1099. [2021-07-09 17:30:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.233151183970856) internal successors, (3550), 1098 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3550 transitions. [2021-07-09 17:30:32,197 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3550 transitions. Word has length 24 [2021-07-09 17:30:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:32,197 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 3550 transitions. [2021-07-09 17:30:32,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3550 transitions. [2021-07-09 17:30:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:32,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:32,198 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:32,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-07-09 17:30:32,399 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash 678435982, now seen corresponding path program 177 times [2021-07-09 17:30:32,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:32,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553847434] [2021-07-09 17:30:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:32,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553847434] [2021-07-09 17:30:32,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553847434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568004326] [2021-07-09 17:30:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:32,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:32,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:32,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:32,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:32,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:30:32,857 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:30:33,013 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:30:33,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:33,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:33,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:33,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:33,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:33,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:33,095 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:33,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:33,100 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:33,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:33,105 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:33,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:33,109 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:33,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:33,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:33,169 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:63 [2021-07-09 17:30:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568004326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:33,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:33,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:33,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670718903] [2021-07-09 17:30:33,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:33,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:33,269 INFO L87 Difference]: Start difference. First operand 1099 states and 3550 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,560 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-07-09 17:30:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:33,932 INFO L93 Difference]: Finished difference Result 1257 states and 3992 transitions. [2021-07-09 17:30:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:33,935 INFO L225 Difference]: With dead ends: 1257 [2021-07-09 17:30:33,935 INFO L226 Difference]: Without dead ends: 1187 [2021-07-09 17:30:33,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-07-09 17:30:33,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1111. [2021-07-09 17:30:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.2315315315315316) internal successors, (3587), 1110 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3587 transitions. [2021-07-09 17:30:33,947 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3587 transitions. Word has length 24 [2021-07-09 17:30:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:33,948 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3587 transitions. [2021-07-09 17:30:33,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3587 transitions. [2021-07-09 17:30:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:33,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:33,949 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:34,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-07-09 17:30:34,157 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1289894484, now seen corresponding path program 178 times [2021-07-09 17:30:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:34,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35861515] [2021-07-09 17:30:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:34,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35861515] [2021-07-09 17:30:34,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35861515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488996882] [2021-07-09 17:30:34,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:34,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:34,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:34,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:34,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:34,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:30:34,885 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-07-09 17:30:34,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:34,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:34,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:34,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:34,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:34,925 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,123 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-09 17:30:35,124 INFO L628 ElimStorePlain]: treesize reduction 173, result has 53.7 percent of original size [2021-07-09 17:30:35,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:35,129 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:35,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:35,135 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:35,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:35,139 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:35,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:35,222 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:108 [2021-07-09 17:30:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488996882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:35,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:35,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:35,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389327867] [2021-07-09 17:30:35,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:35,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:35,381 INFO L87 Difference]: Start difference. First operand 1111 states and 3587 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:36,122 INFO L93 Difference]: Finished difference Result 1356 states and 4268 transitions. [2021-07-09 17:30:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:36,125 INFO L225 Difference]: With dead ends: 1356 [2021-07-09 17:30:36,125 INFO L226 Difference]: Without dead ends: 1276 [2021-07-09 17:30:36,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 931.3ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-09 17:30:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1114. [2021-07-09 17:30:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.2318059299191373) internal successors, (3597), 1113 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3597 transitions. [2021-07-09 17:30:36,138 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3597 transitions. Word has length 24 [2021-07-09 17:30:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:36,138 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3597 transitions. [2021-07-09 17:30:36,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3597 transitions. [2021-07-09 17:30:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:36,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:36,140 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:36,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-07-09 17:30:36,340 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash 661192566, now seen corresponding path program 179 times [2021-07-09 17:30:36,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:36,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652257018] [2021-07-09 17:30:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:36,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:36,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652257018] [2021-07-09 17:30:36,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652257018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872092335] [2021-07-09 17:30:36,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:36,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:36,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:36,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:36,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:36,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:30:36,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:30:36,831 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:30:36,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:36,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:36,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:36,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:36,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:36,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:36,927 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:36,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:36,932 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:36,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:36,937 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:36,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:36,942 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:37,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:37,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:37,015 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-07-09 17:30:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:37,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872092335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:37,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:37,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804007428] [2021-07-09 17:30:37,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:37,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:37,155 INFO L87 Difference]: Start difference. First operand 1114 states and 3597 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:37,666 INFO L93 Difference]: Finished difference Result 1283 states and 4033 transitions. [2021-07-09 17:30:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:37,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:37,669 INFO L225 Difference]: With dead ends: 1283 [2021-07-09 17:30:37,669 INFO L226 Difference]: Without dead ends: 1252 [2021-07-09 17:30:37,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-07-09 17:30:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1113. [2021-07-09 17:30:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 3.2302158273381294) internal successors, (3592), 1112 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3592 transitions. [2021-07-09 17:30:37,687 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3592 transitions. Word has length 24 [2021-07-09 17:30:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:37,687 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3592 transitions. [2021-07-09 17:30:37,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3592 transitions. [2021-07-09 17:30:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:37,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:37,689 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:37,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1428,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:37,889 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -839302772, now seen corresponding path program 180 times [2021-07-09 17:30:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:37,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722885972] [2021-07-09 17:30:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:38,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:38,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722885972] [2021-07-09 17:30:38,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722885972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075525839] [2021-07-09 17:30:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:38,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:38,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:38,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:38,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:38,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:38,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:38,373 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:30:38,570 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:30:38,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:38,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:38,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:30:38,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:30:38,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,683 INFO L628 ElimStorePlain]: treesize reduction 62, result has 62.9 percent of original size [2021-07-09 17:30:38,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:38,687 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:38,691 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:38,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:30:38,736 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:213, output treesize:47 [2021-07-09 17:30:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:38,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075525839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:38,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:38,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799535242] [2021-07-09 17:30:38,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:38,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:38,823 INFO L87 Difference]: Start difference. First operand 1113 states and 3592 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:39,335 INFO L93 Difference]: Finished difference Result 1269 states and 3987 transitions. [2021-07-09 17:30:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:39,338 INFO L225 Difference]: With dead ends: 1269 [2021-07-09 17:30:39,338 INFO L226 Difference]: Without dead ends: 1192 [2021-07-09 17:30:39,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-07-09 17:30:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1111. [2021-07-09 17:30:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.2315315315315316) internal successors, (3587), 1110 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3587 transitions. [2021-07-09 17:30:39,351 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3587 transitions. Word has length 24 [2021-07-09 17:30:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:39,351 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3587 transitions. [2021-07-09 17:30:39,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3587 transitions. [2021-07-09 17:30:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:39,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:39,352 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:39,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1436 [2021-07-09 17:30:39,553 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash 979223708, now seen corresponding path program 181 times [2021-07-09 17:30:39,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:39,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081188644] [2021-07-09 17:30:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:39,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:39,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081188644] [2021-07-09 17:30:39,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081188644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:39,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112499683] [2021-07-09 17:30:39,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:39,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:39,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:39,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:39,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:39,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:39,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:39,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:39,959 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:40,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:40,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:40,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,247 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-09 17:30:40,247 INFO L628 ElimStorePlain]: treesize reduction 164, result has 52.7 percent of original size [2021-07-09 17:30:40,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:40,253 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:40,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:40,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:30:40,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:40,479 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:40,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,544 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:30:40,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:40,549 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:40,616 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:40,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:40,686 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-07-09 17:30:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:40,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112499683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:40,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:40,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478467285] [2021-07-09 17:30:40,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:40,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:40,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:40,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:40,838 INFO L87 Difference]: Start difference. First operand 1111 states and 3587 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:41,425 INFO L93 Difference]: Finished difference Result 1432 states and 4495 transitions. [2021-07-09 17:30:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:41,428 INFO L225 Difference]: With dead ends: 1432 [2021-07-09 17:30:41,428 INFO L226 Difference]: Without dead ends: 1352 [2021-07-09 17:30:41,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 760.0ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-07-09 17:30:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1125. [2021-07-09 17:30:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.2419928825622777) internal successors, (3644), 1124 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3644 transitions. [2021-07-09 17:30:41,443 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3644 transitions. Word has length 24 [2021-07-09 17:30:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:41,443 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 3644 transitions. [2021-07-09 17:30:41,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3644 transitions. [2021-07-09 17:30:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:41,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:41,444 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:41,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:41,645 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1716153124, now seen corresponding path program 182 times [2021-07-09 17:30:41,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:41,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103651819] [2021-07-09 17:30:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:41,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:41,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103651819] [2021-07-09 17:30:41,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103651819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070094085] [2021-07-09 17:30:41,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:41,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:41,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:41,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:41,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:41,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:41,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:42,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:42,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:42,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:42,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:42,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:42,213 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:42,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:42,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:42,325 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:42,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:42,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:42,432 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:42,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:42,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:42,529 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:42,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:42,573 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:30:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:42,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070094085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:42,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:42,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335241283] [2021-07-09 17:30:42,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:42,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:42,704 INFO L87 Difference]: Start difference. First operand 1125 states and 3644 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:43,127 INFO L93 Difference]: Finished difference Result 1441 states and 4475 transitions. [2021-07-09 17:30:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:43,130 INFO L225 Difference]: With dead ends: 1441 [2021-07-09 17:30:43,130 INFO L226 Difference]: Without dead ends: 1352 [2021-07-09 17:30:43,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-07-09 17:30:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1122. [2021-07-09 17:30:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.2417484388938447) internal successors, (3634), 1121 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3634 transitions. [2021-07-09 17:30:43,144 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3634 transitions. Word has length 24 [2021-07-09 17:30:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:43,144 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3634 transitions. [2021-07-09 17:30:43,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3634 transitions. [2021-07-09 17:30:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:43,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:43,145 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:43,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-07-09 17:30:43,346 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:43,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1753428078, now seen corresponding path program 183 times [2021-07-09 17:30:43,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:43,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279713368] [2021-07-09 17:30:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:43,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:43,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279713368] [2021-07-09 17:30:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279713368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952041545] [2021-07-09 17:30:43,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:43,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:43,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:43,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:43,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:43,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:43,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:43,856 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:30:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:43,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:44,007 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:44,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:44,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:44,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:44,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:44,054 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:44,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:44,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:44,074 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:30:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:44,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952041545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:44,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178699898] [2021-07-09 17:30:44,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:44,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:44,161 INFO L87 Difference]: Start difference. First operand 1122 states and 3634 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:44,465 INFO L93 Difference]: Finished difference Result 1298 states and 4114 transitions. [2021-07-09 17:30:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:44,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:44,468 INFO L225 Difference]: With dead ends: 1298 [2021-07-09 17:30:44,468 INFO L226 Difference]: Without dead ends: 1236 [2021-07-09 17:30:44,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-07-09 17:30:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1109. [2021-07-09 17:30:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.232851985559567) internal successors, (3582), 1108 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 3582 transitions. [2021-07-09 17:30:44,481 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 3582 transitions. Word has length 24 [2021-07-09 17:30:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:44,481 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 3582 transitions. [2021-07-09 17:30:44,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 3582 transitions. [2021-07-09 17:30:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:44,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:44,482 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-07-09 17:30:44,683 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,683 INFO L82 PathProgramCache]: Analyzing trace with hash 252028874, now seen corresponding path program 184 times [2021-07-09 17:30:44,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056131636] [2021-07-09 17:30:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:44,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:44,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056131636] [2021-07-09 17:30:44,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056131636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515535233] [2021-07-09 17:30:44,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:44,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:44,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:44,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:44,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:44,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:44,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:44,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:45,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:30:45,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:45,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:45,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,395 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-09 17:30:45,395 INFO L628 ElimStorePlain]: treesize reduction 156, result has 55.3 percent of original size [2021-07-09 17:30:45,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:30:45,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:45,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:45,480 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:45,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:30:45,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:45,640 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:45,711 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:45,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,774 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:30:45,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:45,779 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:45,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:45,843 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-07-09 17:30:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:45,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515535233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:45,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878261451] [2021-07-09 17:30:45,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:45,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:45,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:45,994 INFO L87 Difference]: Start difference. First operand 1109 states and 3582 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,287 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-07-09 17:30:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:47,264 INFO L93 Difference]: Finished difference Result 1687 states and 5284 transitions. [2021-07-09 17:30:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:47,267 INFO L225 Difference]: With dead ends: 1687 [2021-07-09 17:30:47,267 INFO L226 Difference]: Without dead ends: 1607 [2021-07-09 17:30:47,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1356.3ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-07-09 17:30:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1137. [2021-07-09 17:30:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.249119718309859) internal successors, (3691), 1136 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3691 transitions. [2021-07-09 17:30:47,283 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3691 transitions. Word has length 24 [2021-07-09 17:30:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:47,283 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3691 transitions. [2021-07-09 17:30:47,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3691 transitions. [2021-07-09 17:30:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:47,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:47,285 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:47,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,485 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2091851372, now seen corresponding path program 185 times [2021-07-09 17:30:47,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:47,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365363657] [2021-07-09 17:30:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:47,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:47,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365363657] [2021-07-09 17:30:47,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365363657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480582774] [2021-07-09 17:30:47,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:47,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:47,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:47,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:47,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:47,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:47,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:47,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:47,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:47,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:30:48,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:48,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:48,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:48,163 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:48,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:48,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:48,271 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:48,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:48,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:48,379 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:48,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:48,435 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:48,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:48,498 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:30:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:48,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480582774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:48,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:48,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024127614] [2021-07-09 17:30:48,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:48,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:48,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:48,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:48,625 INFO L87 Difference]: Start difference. First operand 1137 states and 3691 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,951 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-07-09 17:30:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:49,532 INFO L93 Difference]: Finished difference Result 1668 states and 5181 transitions. [2021-07-09 17:30:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:49,535 INFO L225 Difference]: With dead ends: 1668 [2021-07-09 17:30:49,536 INFO L226 Difference]: Without dead ends: 1598 [2021-07-09 17:30:49,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1033.0ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-07-09 17:30:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1137. [2021-07-09 17:30:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.2473591549295775) internal successors, (3689), 1136 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3689 transitions. [2021-07-09 17:30:49,551 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3689 transitions. Word has length 24 [2021-07-09 17:30:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:49,551 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3689 transitions. [2021-07-09 17:30:49,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3689 transitions. [2021-07-09 17:30:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:49,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:49,552 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:49,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1478,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:49,753 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash 193723210, now seen corresponding path program 186 times [2021-07-09 17:30:49,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:49,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809569086] [2021-07-09 17:30:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:49,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:49,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809569086] [2021-07-09 17:30:49,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809569086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576898980] [2021-07-09 17:30:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:50,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:30:50,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:50,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:50,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:50,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:50,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:50,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:50,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:50,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:30:50,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:50,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:50,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:50,331 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:50,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:50,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:50,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:50,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:50,381 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:50,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:50,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:50,402 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:30:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:30:50,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576898980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:50,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:50,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827217625] [2021-07-09 17:30:50,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:50,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:50,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:50,491 INFO L87 Difference]: Start difference. First operand 1137 states and 3689 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:51,287 INFO L93 Difference]: Finished difference Result 1692 states and 5285 transitions. [2021-07-09 17:30:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:51,290 INFO L225 Difference]: With dead ends: 1692 [2021-07-09 17:30:51,290 INFO L226 Difference]: Without dead ends: 1623 [2021-07-09 17:30:51,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-07-09 17:30:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1141. [2021-07-09 17:30:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.25) internal successors, (3705), 1140 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3705 transitions. [2021-07-09 17:30:51,305 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3705 transitions. Word has length 24 [2021-07-09 17:30:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:51,305 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3705 transitions. [2021-07-09 17:30:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3705 transitions. [2021-07-09 17:30:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:51,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:51,307 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:51,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-07-09 17:30:51,507 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash -332560710, now seen corresponding path program 187 times [2021-07-09 17:30:51,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:51,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028650278] [2021-07-09 17:30:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:51,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028650278] [2021-07-09 17:30:51,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028650278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559262788] [2021-07-09 17:30:51,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:51,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:51,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:51,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:51,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:51,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:51,830 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:30:52,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:52,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:52,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,146 INFO L628 ElimStorePlain]: treesize reduction 63, result has 58.3 percent of original size [2021-07-09 17:30:52,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:52,150 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:52,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:52,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:52,227 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:52,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:30:52,258 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:30:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:52,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559262788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:52,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764893627] [2021-07-09 17:30:52,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:52,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:52,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:52,342 INFO L87 Difference]: Start difference. First operand 1141 states and 3705 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,263 INFO L93 Difference]: Finished difference Result 1739 states and 5376 transitions. [2021-07-09 17:30:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:53,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,266 INFO L225 Difference]: With dead ends: 1739 [2021-07-09 17:30:53,266 INFO L226 Difference]: Without dead ends: 1662 [2021-07-09 17:30:53,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1000.5ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-07-09 17:30:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1153. [2021-07-09 17:30:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 3.2526041666666665) internal successors, (3747), 1152 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3747 transitions. [2021-07-09 17:30:53,282 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3747 transitions. Word has length 24 [2021-07-09 17:30:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,282 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3747 transitions. [2021-07-09 17:30:53,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3747 transitions. [2021-07-09 17:30:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:53,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,283 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1494,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,484 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1988570202, now seen corresponding path program 188 times [2021-07-09 17:30:53,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215447210] [2021-07-09 17:30:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:53,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215447210] [2021-07-09 17:30:53,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215447210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017242552] [2021-07-09 17:30:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:53,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:53,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:53,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:53,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:53,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:53,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:53,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:53,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:53,765 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:30:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:53,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:54,007 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:54,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-07-09 17:30:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:54,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017242552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:54,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:54,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31955606] [2021-07-09 17:30:54,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:54,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:54,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:54,052 INFO L87 Difference]: Start difference. First operand 1153 states and 3747 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:54,510 INFO L93 Difference]: Finished difference Result 1608 states and 5046 transitions. [2021-07-09 17:30:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:54,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:54,513 INFO L225 Difference]: With dead ends: 1608 [2021-07-09 17:30:54,513 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 17:30:54,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 17:30:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1132. [2021-07-09 17:30:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 3.2484526967285587) internal successors, (3674), 1131 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 3674 transitions. [2021-07-09 17:30:54,528 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 3674 transitions. Word has length 24 [2021-07-09 17:30:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:54,528 INFO L482 AbstractCegarLoop]: Abstraction has 1132 states and 3674 transitions. [2021-07-09 17:30:54,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 3674 transitions. [2021-07-09 17:30:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:54,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:54,529 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:54,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,746 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1318679352, now seen corresponding path program 189 times [2021-07-09 17:30:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:54,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963671741] [2021-07-09 17:30:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:54,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:54,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963671741] [2021-07-09 17:30:54,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963671741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017162429] [2021-07-09 17:30:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:54,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:55,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:30:55,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:55,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:55,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:55,033 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:37 [2021-07-09 17:30:55,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:55,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:55,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,123 INFO L628 ElimStorePlain]: treesize reduction 17, result has 41.4 percent of original size [2021-07-09 17:30:55,123 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:30:55,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:12 [2021-07-09 17:30:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:55,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017162429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:55,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251986580] [2021-07-09 17:30:55,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:55,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:55,185 INFO L87 Difference]: Start difference. First operand 1132 states and 3674 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:56,093 INFO L93 Difference]: Finished difference Result 1656 states and 5187 transitions. [2021-07-09 17:30:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:56,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:56,096 INFO L225 Difference]: With dead ends: 1656 [2021-07-09 17:30:56,096 INFO L226 Difference]: Without dead ends: 1523 [2021-07-09 17:30:56,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:30:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-07-09 17:30:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1148. [2021-07-09 17:30:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.2432432432432434) internal successors, (3720), 1147 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3720 transitions. [2021-07-09 17:30:56,111 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3720 transitions. Word has length 24 [2021-07-09 17:30:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:56,111 INFO L482 AbstractCegarLoop]: Abstraction has 1148 states and 3720 transitions. [2021-07-09 17:30:56,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3720 transitions. [2021-07-09 17:30:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:56,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:56,112 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:56,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1506 [2021-07-09 17:30:56,326 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash 874027726, now seen corresponding path program 190 times [2021-07-09 17:30:56,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:56,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072246063] [2021-07-09 17:30:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:56,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:56,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072246063] [2021-07-09 17:30:56,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072246063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194755116] [2021-07-09 17:30:56,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:56,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:56,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:56,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:30:56,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:56,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:56,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:56,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:37 [2021-07-09 17:30:56,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:56,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:56,665 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:30:56,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-07-09 17:30:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:56,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194755116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:56,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092149333] [2021-07-09 17:30:56,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:56,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:56,719 INFO L87 Difference]: Start difference. First operand 1148 states and 3720 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:57,802 INFO L93 Difference]: Finished difference Result 1685 states and 5290 transitions. [2021-07-09 17:30:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:57,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:57,806 INFO L225 Difference]: With dead ends: 1685 [2021-07-09 17:30:57,806 INFO L226 Difference]: Without dead ends: 1608 [2021-07-09 17:30:57,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 922.2ms TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:30:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-07-09 17:30:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1151. [2021-07-09 17:30:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 3.242608695652174) internal successors, (3729), 1150 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 3729 transitions. [2021-07-09 17:30:57,821 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 3729 transitions. Word has length 24 [2021-07-09 17:30:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:57,822 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 3729 transitions. [2021-07-09 17:30:57,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 3729 transitions. [2021-07-09 17:30:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:57,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:57,823 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:58,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,024 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -863944090, now seen corresponding path program 191 times [2021-07-09 17:30:58,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:58,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499443579] [2021-07-09 17:30:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:58,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:58,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499443579] [2021-07-09 17:30:58,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499443579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401137997] [2021-07-09 17:30:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:58,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:58,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:30:58,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:58,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:58,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:58,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2021-07-09 17:30:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:58,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:58,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:30:58,309 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:58,312 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:58,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:58,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:58,324 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:27 [2021-07-09 17:30:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:58,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401137997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:58,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:58,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070261735] [2021-07-09 17:30:58,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:58,392 INFO L87 Difference]: Start difference. First operand 1151 states and 3729 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:59,517 INFO L93 Difference]: Finished difference Result 1782 states and 5579 transitions. [2021-07-09 17:30:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:30:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:59,521 INFO L225 Difference]: With dead ends: 1782 [2021-07-09 17:30:59,521 INFO L226 Difference]: Without dead ends: 1701 [2021-07-09 17:30:59,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:30:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-07-09 17:30:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1154. [2021-07-09 17:30:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.241110147441457) internal successors, (3737), 1153 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 3737 transitions. [2021-07-09 17:30:59,537 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 3737 transitions. Word has length 24 [2021-07-09 17:30:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:59,537 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 3737 transitions. [2021-07-09 17:30:59,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 3737 transitions. [2021-07-09 17:30:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:30:59,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:59,539 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:59,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1510,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,739 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash -885262936, now seen corresponding path program 192 times [2021-07-09 17:30:59,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:59,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031340662] [2021-07-09 17:30:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:30:59,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:59,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031340662] [2021-07-09 17:30:59,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031340662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429468743] [2021-07-09 17:30:59,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:59,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:59,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:59,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:30:59,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:00,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:00,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:00,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:00,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:00,039 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-07-09 17:31:00,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:00,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:00,150 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:00,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:00,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:00,165 INFO L518 ElimStorePlain]: Eliminatee v_prenex_751 vanished before elimination [2021-07-09 17:31:00,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:00,165 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:29 [2021-07-09 17:31:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:00,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429468743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:00,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:31:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061480774] [2021-07-09 17:31:00,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:00,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:00,225 INFO L87 Difference]: Start difference. First operand 1154 states and 3737 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:00,590 INFO L93 Difference]: Finished difference Result 1430 states and 4527 transitions. [2021-07-09 17:31:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:00,592 INFO L225 Difference]: With dead ends: 1430 [2021-07-09 17:31:00,592 INFO L226 Difference]: Without dead ends: 1399 [2021-07-09 17:31:00,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-07-09 17:31:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1160. [2021-07-09 17:31:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.2372735116479725) internal successors, (3752), 1159 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3752 transitions. [2021-07-09 17:31:00,606 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3752 transitions. Word has length 24 [2021-07-09 17:31:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,606 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3752 transitions. [2021-07-09 17:31:00,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3752 transitions. [2021-07-09 17:31:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:00,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,608 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:00,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-07-09 17:31:00,808 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1671732544, now seen corresponding path program 193 times [2021-07-09 17:31:00,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:00,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423431722] [2021-07-09 17:31:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:00,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423431722] [2021-07-09 17:31:00,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423431722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209565582] [2021-07-09 17:31:00,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:01,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:01,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:01,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:01,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:01,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:01,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:01,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:01,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:01,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:01,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-07-09 17:31:01,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:01,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:01,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:01,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:01,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:01,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_757 vanished before elimination [2021-07-09 17:31:01,274 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:01,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:01,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:01,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_753 vanished before elimination [2021-07-09 17:31:01,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:01,318 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:01,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:01,355 INFO L518 ElimStorePlain]: Eliminatee v_prenex_755 vanished before elimination [2021-07-09 17:31:01,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:31:01,356 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:183, output treesize:81 [2021-07-09 17:31:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:01,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209565582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:01,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:31:01,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658292171] [2021-07-09 17:31:01,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:01,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:01,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:01,471 INFO L87 Difference]: Start difference. First operand 1160 states and 3752 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:02,081 INFO L93 Difference]: Finished difference Result 1462 states and 4607 transitions. [2021-07-09 17:31:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:02,084 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:31:02,084 INFO L226 Difference]: Without dead ends: 1427 [2021-07-09 17:31:02,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 742.3ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-09 17:31:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1158. [2021-07-09 17:31:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.2385479688850474) internal successors, (3747), 1157 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3747 transitions. [2021-07-09 17:31:02,098 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3747 transitions. Word has length 24 [2021-07-09 17:31:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:02,099 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3747 transitions. [2021-07-09 17:31:02,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3747 transitions. [2021-07-09 17:31:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:02,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:02,100 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:02,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-07-09 17:31:02,300 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1134239688, now seen corresponding path program 194 times [2021-07-09 17:31:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:02,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368249813] [2021-07-09 17:31:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:02,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:02,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368249813] [2021-07-09 17:31:02,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368249813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133720477] [2021-07-09 17:31:02,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:02,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:02,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:02,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:02,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:55 [2021-07-09 17:31:02,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:02,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:02,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,740 INFO L628 ElimStorePlain]: treesize reduction 44, result has 63.6 percent of original size [2021-07-09 17:31:02,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:02,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:02,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:02,770 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:02,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:02,773 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:02,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:02,795 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:02,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:31:02,795 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:133, output treesize:47 [2021-07-09 17:31:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:02,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133720477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:02,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:02,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994553075] [2021-07-09 17:31:02,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:02,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:02,874 INFO L87 Difference]: Start difference. First operand 1158 states and 3747 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,267 INFO L93 Difference]: Finished difference Result 1426 states and 4503 transitions. [2021-07-09 17:31:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,269 INFO L225 Difference]: With dead ends: 1426 [2021-07-09 17:31:03,269 INFO L226 Difference]: Without dead ends: 1373 [2021-07-09 17:31:03,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-07-09 17:31:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1158. [2021-07-09 17:31:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.2385479688850474) internal successors, (3747), 1157 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3747 transitions. [2021-07-09 17:31:03,293 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3747 transitions. Word has length 24 [2021-07-09 17:31:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,293 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3747 transitions. [2021-07-09 17:31:03,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3747 transitions. [2021-07-09 17:31:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:03,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,295 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1529 [2021-07-09 17:31:03,497 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2019822032, now seen corresponding path program 195 times [2021-07-09 17:31:03,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137667769] [2021-07-09 17:31:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:03,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137667769] [2021-07-09 17:31:03,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137667769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883224289] [2021-07-09 17:31:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:03,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:03,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:03,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:03,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:03,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:39 [2021-07-09 17:31:03,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:03,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:03,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:03,895 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:03,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:03,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:11 [2021-07-09 17:31:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:03,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883224289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:03,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585302340] [2021-07-09 17:31:03,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:03,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:03,933 INFO L87 Difference]: Start difference. First operand 1158 states and 3747 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:04,207 INFO L93 Difference]: Finished difference Result 1478 states and 4637 transitions. [2021-07-09 17:31:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:04,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:04,210 INFO L225 Difference]: With dead ends: 1478 [2021-07-09 17:31:04,210 INFO L226 Difference]: Without dead ends: 1447 [2021-07-09 17:31:04,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-07-09 17:31:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1164. [2021-07-09 17:31:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 3.2347377472055032) internal successors, (3762), 1163 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3762 transitions. [2021-07-09 17:31:04,224 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3762 transitions. Word has length 24 [2021-07-09 17:31:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:04,225 INFO L482 AbstractCegarLoop]: Abstraction has 1164 states and 3762 transitions. [2021-07-09 17:31:04,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3762 transitions. [2021-07-09 17:31:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:04,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:04,226 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:04,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1532 [2021-07-09 17:31:04,426 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash 537173448, now seen corresponding path program 196 times [2021-07-09 17:31:04,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:04,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951518486] [2021-07-09 17:31:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:04,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951518486] [2021-07-09 17:31:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951518486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68138300] [2021-07-09 17:31:04,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:04,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:04,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:04,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:04,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:04,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:04,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:39 [2021-07-09 17:31:04,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:04,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:04,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:04,793 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:04,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:04,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:04,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:04,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:04,824 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:04,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:04,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:04,836 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-07-09 17:31:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:04,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68138300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:04,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:04,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960822775] [2021-07-09 17:31:04,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:04,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:04,902 INFO L87 Difference]: Start difference. First operand 1164 states and 3762 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:05,321 INFO L93 Difference]: Finished difference Result 1510 states and 4717 transitions. [2021-07-09 17:31:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:05,324 INFO L225 Difference]: With dead ends: 1510 [2021-07-09 17:31:05,324 INFO L226 Difference]: Without dead ends: 1475 [2021-07-09 17:31:05,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-07-09 17:31:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1162. [2021-07-09 17:31:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.236003445305771) internal successors, (3757), 1161 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3757 transitions. [2021-07-09 17:31:05,340 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3757 transitions. Word has length 24 [2021-07-09 17:31:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:05,340 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 3757 transitions. [2021-07-09 17:31:05,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3757 transitions. [2021-07-09 17:31:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:05,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:05,341 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:05,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1534 [2021-07-09 17:31:05,542 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash -319408, now seen corresponding path program 197 times [2021-07-09 17:31:05,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:05,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180104189] [2021-07-09 17:31:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:05,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:05,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180104189] [2021-07-09 17:31:05,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180104189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253629881] [2021-07-09 17:31:05,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:05,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:05,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:05,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:05,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:05,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:05,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:05,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:81, output treesize:71 [2021-07-09 17:31:05,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:31:05,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:05,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,915 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:05,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:31:05,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:05,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:05,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_763 vanished before elimination [2021-07-09 17:31:05,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:05,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:157, output treesize:65 [2021-07-09 17:31:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:06,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253629881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:31:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70065177] [2021-07-09 17:31:06,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:06,074 INFO L87 Difference]: Start difference. First operand 1162 states and 3757 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:06,511 INFO L93 Difference]: Finished difference Result 1474 states and 4627 transitions. [2021-07-09 17:31:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:06,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:06,513 INFO L225 Difference]: With dead ends: 1474 [2021-07-09 17:31:06,513 INFO L226 Difference]: Without dead ends: 1435 [2021-07-09 17:31:06,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-07-09 17:31:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1160. [2021-07-09 17:31:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.2372735116479725) internal successors, (3752), 1159 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3752 transitions. [2021-07-09 17:31:06,527 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3752 transitions. Word has length 24 [2021-07-09 17:31:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,527 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3752 transitions. [2021-07-09 17:31:06,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3752 transitions. [2021-07-09 17:31:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:06,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,528 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:06,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,729 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:06,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1500814746, now seen corresponding path program 198 times [2021-07-09 17:31:06,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:06,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523529616] [2021-07-09 17:31:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:06,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:06,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523529616] [2021-07-09 17:31:06,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523529616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387109202] [2021-07-09 17:31:06,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:06,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:06,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:06,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:06,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:06,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:06,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:06,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:06,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:06,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:07,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:07,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:141 [2021-07-09 17:31:07,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:31:07,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:07,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:31:07,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:07,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:31:07,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:07,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:07,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:31:07,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:07,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:07,155 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:07,157 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,238 INFO L628 ElimStorePlain]: treesize reduction 92, result has 45.6 percent of original size [2021-07-09 17:31:07,238 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:07,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:07,239 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:353, output treesize:77 [2021-07-09 17:31:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:07,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387109202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:07,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:31:07,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418789913] [2021-07-09 17:31:07,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:07,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:07,327 INFO L87 Difference]: Start difference. First operand 1160 states and 3752 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,837 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-07-09 17:31:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:08,067 INFO L93 Difference]: Finished difference Result 1653 states and 5027 transitions. [2021-07-09 17:31:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:08,069 INFO L225 Difference]: With dead ends: 1653 [2021-07-09 17:31:08,070 INFO L226 Difference]: Without dead ends: 1530 [2021-07-09 17:31:08,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 918.5ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-07-09 17:31:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1164. [2021-07-09 17:31:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 3.2347377472055032) internal successors, (3762), 1163 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3762 transitions. [2021-07-09 17:31:08,085 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3762 transitions. Word has length 24 [2021-07-09 17:31:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:08,085 INFO L482 AbstractCegarLoop]: Abstraction has 1164 states and 3762 transitions. [2021-07-09 17:31:08,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3762 transitions. [2021-07-09 17:31:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:08,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:08,086 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:08,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1543,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,287 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:08,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1968098314, now seen corresponding path program 199 times [2021-07-09 17:31:08,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:08,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320959758] [2021-07-09 17:31:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:08,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320959758] [2021-07-09 17:31:08,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320959758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635452802] [2021-07-09 17:31:08,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:08,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:08,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:08,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:08,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:08,579 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-07-09 17:31:08,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:08,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:08,635 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:08,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-07-09 17:31:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:08,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635452802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:08,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:08,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074645001] [2021-07-09 17:31:08,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:08,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:08,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:08,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:08,672 INFO L87 Difference]: Start difference. First operand 1164 states and 3762 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:08,975 INFO L93 Difference]: Finished difference Result 1454 states and 4593 transitions. [2021-07-09 17:31:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:08,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:08,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:08,978 INFO L225 Difference]: With dead ends: 1454 [2021-07-09 17:31:08,978 INFO L226 Difference]: Without dead ends: 1423 [2021-07-09 17:31:08,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-07-09 17:31:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1168. [2021-07-09 17:31:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.2322193658954586) internal successors, (3772), 1167 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3772 transitions. [2021-07-09 17:31:08,992 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3772 transitions. Word has length 24 [2021-07-09 17:31:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:08,992 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3772 transitions. [2021-07-09 17:31:08,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3772 transitions. [2021-07-09 17:31:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:08,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:08,994 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:09,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-07-09 17:31:09,194 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:09,194 INFO L82 PathProgramCache]: Analyzing trace with hash 230126498, now seen corresponding path program 200 times [2021-07-09 17:31:09,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:09,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162825149] [2021-07-09 17:31:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:09,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:09,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162825149] [2021-07-09 17:31:09,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162825149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185695470] [2021-07-09 17:31:09,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:09,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:09,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:09,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:09,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:09,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:39 [2021-07-09 17:31:09,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:09,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:09,550 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:09,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:09,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:09,580 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:09,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:09,593 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-07-09 17:31:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:09,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185695470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:09,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:09,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23966745] [2021-07-09 17:31:09,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:09,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:09,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:09,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:09,660 INFO L87 Difference]: Start difference. First operand 1168 states and 3772 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:10,133 INFO L93 Difference]: Finished difference Result 1486 states and 4673 transitions. [2021-07-09 17:31:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:10,133 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:10,135 INFO L225 Difference]: With dead ends: 1486 [2021-07-09 17:31:10,136 INFO L226 Difference]: Without dead ends: 1451 [2021-07-09 17:31:10,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:31:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-07-09 17:31:10,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1166. [2021-07-09 17:31:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 3.2334763948497853) internal successors, (3767), 1165 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 3767 transitions. [2021-07-09 17:31:10,151 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 3767 transitions. Word has length 24 [2021-07-09 17:31:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:10,151 INFO L482 AbstractCegarLoop]: Abstraction has 1166 states and 3767 transitions. [2021-07-09 17:31:10,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 3767 transitions. [2021-07-09 17:31:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:10,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:10,153 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:10,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,353 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash -307366358, now seen corresponding path program 201 times [2021-07-09 17:31:10,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:10,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364422804] [2021-07-09 17:31:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:10,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:10,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364422804] [2021-07-09 17:31:10,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364422804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270163945] [2021-07-09 17:31:10,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:10,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:10,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:10,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:10,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:10,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:10,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-07-09 17:31:10,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:10,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:10,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:10,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:10,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:10,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:10,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:10,750 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:10,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:10,753 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:10,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:10,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:10,783 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:10,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:10,786 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:10,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:10,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:10,813 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:117, output treesize:57 [2021-07-09 17:31:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270163945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137800873] [2021-07-09 17:31:10,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:10,909 INFO L87 Difference]: Start difference. First operand 1166 states and 3767 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,981 INFO L93 Difference]: Finished difference Result 1643 states and 5118 transitions. [2021-07-09 17:31:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,985 INFO L225 Difference]: With dead ends: 1643 [2021-07-09 17:31:11,985 INFO L226 Difference]: Without dead ends: 1555 [2021-07-09 17:31:11,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1001.8ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:31:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-09 17:31:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1171. [2021-07-09 17:31:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.235897435897436) internal successors, (3786), 1170 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3786 transitions. [2021-07-09 17:31:12,000 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3786 transitions. Word has length 24 [2021-07-09 17:31:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:12,000 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3786 transitions. [2021-07-09 17:31:12,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3786 transitions. [2021-07-09 17:31:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:12,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:12,002 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:12,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-07-09 17:31:12,202 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:12,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1277024848, now seen corresponding path program 202 times [2021-07-09 17:31:12,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:12,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436552650] [2021-07-09 17:31:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:12,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:12,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436552650] [2021-07-09 17:31:12,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436552650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244829086] [2021-07-09 17:31:12,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:12,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:12,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:12,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:12,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:12,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:12,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:12,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:31:12,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:12,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:12,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:12,717 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:12,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:12,720 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:12,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:12,732 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:27 [2021-07-09 17:31:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:12,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244829086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:12,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591814001] [2021-07-09 17:31:12,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:12,811 INFO L87 Difference]: Start difference. First operand 1171 states and 3786 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,693 INFO L93 Difference]: Finished difference Result 1737 states and 5357 transitions. [2021-07-09 17:31:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:13,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,697 INFO L225 Difference]: With dead ends: 1737 [2021-07-09 17:31:13,697 INFO L226 Difference]: Without dead ends: 1702 [2021-07-09 17:31:13,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1052.3ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-07-09 17:31:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1169. [2021-07-09 17:31:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.2388698630136985) internal successors, (3783), 1168 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3783 transitions. [2021-07-09 17:31:13,713 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3783 transitions. Word has length 24 [2021-07-09 17:31:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:13,713 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3783 transitions. [2021-07-09 17:31:13,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3783 transitions. [2021-07-09 17:31:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:13,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:13,715 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:13,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,915 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:13,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1666513810, now seen corresponding path program 203 times [2021-07-09 17:31:13,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:13,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726363927] [2021-07-09 17:31:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:14,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:14,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726363927] [2021-07-09 17:31:14,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726363927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072367573] [2021-07-09 17:31:14,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:14,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:14,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:14,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:14,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:14,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:14,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:14,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:14,312 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-07-09 17:31:14,529 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_772], 1=[o_4, v_prenex_773]} [2021-07-09 17:31:14,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:14,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:14,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:14,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:14,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:14,578 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:14,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:14,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:14,600 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:14,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:14,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:14,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-07-09 17:31:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:14,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072367573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:14,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:14,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76276462] [2021-07-09 17:31:14,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:14,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:14,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:14,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:14,711 INFO L87 Difference]: Start difference. First operand 1169 states and 3783 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,418 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-07-09 17:31:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,513 INFO L93 Difference]: Finished difference Result 1864 states and 5705 transitions. [2021-07-09 17:31:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,516 INFO L225 Difference]: With dead ends: 1864 [2021-07-09 17:31:16,516 INFO L226 Difference]: Without dead ends: 1732 [2021-07-09 17:31:16,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1752.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:31:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-07-09 17:31:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1169. [2021-07-09 17:31:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.2371575342465753) internal successors, (3781), 1168 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3781 transitions. [2021-07-09 17:31:16,532 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3781 transitions. Word has length 24 [2021-07-09 17:31:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,532 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3781 transitions. [2021-07-09 17:31:16,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3781 transitions. [2021-07-09 17:31:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:16,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,534 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:16,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1564 [2021-07-09 17:31:16,734 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:16,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1271483800, now seen corresponding path program 204 times [2021-07-09 17:31:16,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:16,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409061529] [2021-07-09 17:31:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:16,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409061529] [2021-07-09 17:31:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409061529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869450337] [2021-07-09 17:31:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:16,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:17,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:17,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:17,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:17,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:17,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:17,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:17,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:17,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:17,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:55 [2021-07-09 17:31:17,217 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:31:17,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:17,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:17,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:17,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:17,245 INFO L628 ElimStorePlain]: treesize reduction 41, result has 38.8 percent of original size [2021-07-09 17:31:17,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:17,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:17,249 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:17,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:17,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:17,256 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-07-09 17:31:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:17,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869450337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:17,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:17,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605393200] [2021-07-09 17:31:17,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:17,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:17,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:17,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:17,292 INFO L87 Difference]: Start difference. First operand 1169 states and 3781 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,681 INFO L93 Difference]: Finished difference Result 1449 states and 4571 transitions. [2021-07-09 17:31:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,683 INFO L225 Difference]: With dead ends: 1449 [2021-07-09 17:31:17,684 INFO L226 Difference]: Without dead ends: 1390 [2021-07-09 17:31:17,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-09 17:31:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1169. [2021-07-09 17:31:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.2371575342465753) internal successors, (3781), 1168 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3781 transitions. [2021-07-09 17:31:17,698 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3781 transitions. Word has length 24 [2021-07-09 17:31:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,698 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3781 transitions. [2021-07-09 17:31:17,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3781 transitions. [2021-07-09 17:31:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:17,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,699 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1577,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,900 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1285511680, now seen corresponding path program 205 times [2021-07-09 17:31:17,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298383378] [2021-07-09 17:31:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:18,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:18,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298383378] [2021-07-09 17:31:18,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298383378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866989492] [2021-07-09 17:31:18,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:18,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:18,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:18,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:18,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:18,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-07-09 17:31:18,367 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_778, o_0], 1=[v_prenex_779, o_4]} [2021-07-09 17:31:18,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:18,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:18,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:18,417 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:18,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:18,438 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:18,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:18,456 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-07-09 17:31:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:18,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866989492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:18,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:18,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323609305] [2021-07-09 17:31:18,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:18,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:18,536 INFO L87 Difference]: Start difference. First operand 1169 states and 3781 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:18,982 INFO L93 Difference]: Finished difference Result 1441 states and 4563 transitions. [2021-07-09 17:31:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:18,984 INFO L225 Difference]: With dead ends: 1441 [2021-07-09 17:31:18,985 INFO L226 Difference]: Without dead ends: 1406 [2021-07-09 17:31:18,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 545.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-07-09 17:31:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1169. [2021-07-09 17:31:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.2371575342465753) internal successors, (3781), 1168 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3781 transitions. [2021-07-09 17:31:18,999 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3781 transitions. Word has length 24 [2021-07-09 17:31:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:18,999 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3781 transitions. [2021-07-09 17:31:18,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3781 transitions. [2021-07-09 17:31:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:19,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:19,001 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:19,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1582,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,201 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2134781194, now seen corresponding path program 206 times [2021-07-09 17:31:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:19,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277384336] [2021-07-09 17:31:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:19,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:19,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277384336] [2021-07-09 17:31:19,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277384336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745076248] [2021-07-09 17:31:19,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:19,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:19,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:19,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:19,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:19,702 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:31:19,894 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:31:19,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:19,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:19,910 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:19,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-07-09 17:31:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:19,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745076248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:19,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210649479] [2021-07-09 17:31:19,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:19,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:19,956 INFO L87 Difference]: Start difference. First operand 1169 states and 3781 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,723 INFO L93 Difference]: Finished difference Result 1540 states and 4819 transitions. [2021-07-09 17:31:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:20,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,726 INFO L225 Difference]: With dead ends: 1540 [2021-07-09 17:31:20,726 INFO L226 Difference]: Without dead ends: 1482 [2021-07-09 17:31:20,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 909.9ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-07-09 17:31:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1184. [2021-07-09 17:31:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 3.2366863905325443) internal successors, (3829), 1183 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3829 transitions. [2021-07-09 17:31:20,742 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3829 transitions. Word has length 24 [2021-07-09 17:31:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,742 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3829 transitions. [2021-07-09 17:31:20,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3829 transitions. [2021-07-09 17:31:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:20,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,743 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:20,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1590 [2021-07-09 17:31:20,944 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash 396809378, now seen corresponding path program 207 times [2021-07-09 17:31:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:20,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47418586] [2021-07-09 17:31:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:21,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47418586] [2021-07-09 17:31:21,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47418586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622866805] [2021-07-09 17:31:21,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:21,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:21,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:21,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:21,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:21,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:31:21,399 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_785], 1=[o_4, v_prenex_786]} [2021-07-09 17:31:21,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:21,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:21,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:21,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:21,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:21,505 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:21,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:21,509 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:21,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:21,554 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:21,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:21,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:21,557 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:21,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:21,597 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-07-09 17:31:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622866805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:21,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695070314] [2021-07-09 17:31:21,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:21,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:21,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:21,704 INFO L87 Difference]: Start difference. First operand 1184 states and 3829 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:22,893 INFO L93 Difference]: Finished difference Result 1853 states and 5629 transitions. [2021-07-09 17:31:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:22,897 INFO L225 Difference]: With dead ends: 1853 [2021-07-09 17:31:22,897 INFO L226 Difference]: Without dead ends: 1746 [2021-07-09 17:31:22,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1126.2ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:31:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-07-09 17:31:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1182. [2021-07-09 17:31:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.2379339542760373) internal successors, (3824), 1181 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3824 transitions. [2021-07-09 17:31:22,914 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3824 transitions. Word has length 24 [2021-07-09 17:31:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:22,914 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3824 transitions. [2021-07-09 17:31:22,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3824 transitions. [2021-07-09 17:31:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:22,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:22,915 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:23,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1600,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,117 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash -96944408, now seen corresponding path program 208 times [2021-07-09 17:31:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:23,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166642827] [2021-07-09 17:31:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:23,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:23,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166642827] [2021-07-09 17:31:23,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166642827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395170670] [2021-07-09 17:31:23,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:23,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:23,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:23,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:23,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:23,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:23,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:23,583 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:31:23,742 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:31:23,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:23,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:23,754 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:23,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:11 [2021-07-09 17:31:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:23,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395170670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:23,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:31:23,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832426310] [2021-07-09 17:31:23,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:23,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:23,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:23,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:23,788 INFO L87 Difference]: Start difference. First operand 1182 states and 3824 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,226 INFO L93 Difference]: Finished difference Result 1497 states and 4715 transitions. [2021-07-09 17:31:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:24,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,229 INFO L225 Difference]: With dead ends: 1497 [2021-07-09 17:31:24,229 INFO L226 Difference]: Without dead ends: 1466 [2021-07-09 17:31:24,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-07-09 17:31:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1177. [2021-07-09 17:31:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.24234693877551) internal successors, (3813), 1176 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3813 transitions. [2021-07-09 17:31:24,243 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3813 transitions. Word has length 24 [2021-07-09 17:31:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:24,243 INFO L482 AbstractCegarLoop]: Abstraction has 1177 states and 3813 transitions. [2021-07-09 17:31:24,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3813 transitions. [2021-07-09 17:31:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:24,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:24,245 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:24,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1620 [2021-07-09 17:31:24,445 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1417531126, now seen corresponding path program 209 times [2021-07-09 17:31:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016302233] [2021-07-09 17:31:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:24,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:24,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016302233] [2021-07-09 17:31:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016302233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105132581] [2021-07-09 17:31:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:24,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:24,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:24,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:24,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:24,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:24,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:24,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:24,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:24,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:24,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:24,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:24,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:24,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:24,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:24,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:24,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:24,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:24,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:24,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:24,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:31:25,125 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_795], 1=[o_4, v_prenex_796]} [2021-07-09 17:31:25,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:25,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:25,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:25,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:25,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:25,179 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:25,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:25,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:25,203 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:25,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:25,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:25,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:31:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:25,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105132581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:25,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:25,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871130582] [2021-07-09 17:31:25,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:25,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:25,296 INFO L87 Difference]: Start difference. First operand 1177 states and 3813 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:25,993 INFO L93 Difference]: Finished difference Result 1595 states and 4985 transitions. [2021-07-09 17:31:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:25,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:25,996 INFO L225 Difference]: With dead ends: 1595 [2021-07-09 17:31:25,996 INFO L226 Difference]: Without dead ends: 1518 [2021-07-09 17:31:25,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 752.3ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-07-09 17:31:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1170. [2021-07-09 17:31:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.237810094097519) internal successors, (3785), 1169 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3785 transitions. [2021-07-09 17:31:26,011 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3785 transitions. Word has length 24 [2021-07-09 17:31:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:26,011 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 3785 transitions. [2021-07-09 17:31:26,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3785 transitions. [2021-07-09 17:31:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:26,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:26,013 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:26,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,214 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash 632347538, now seen corresponding path program 210 times [2021-07-09 17:31:26,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:26,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095967911] [2021-07-09 17:31:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:26,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095967911] [2021-07-09 17:31:26,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095967911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570358740] [2021-07-09 17:31:26,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:26,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:26,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:26,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:26,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:26,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:26,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:26,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:26,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:26,559 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-07-09 17:31:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:26,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:26,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,695 INFO L628 ElimStorePlain]: treesize reduction 68, result has 42.9 percent of original size [2021-07-09 17:31:26,695 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:26,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:26,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,713 INFO L628 ElimStorePlain]: treesize reduction 15, result has 50.0 percent of original size [2021-07-09 17:31:26,713 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-07-09 17:31:26,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,713 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:161, output treesize:15 [2021-07-09 17:31:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:26,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570358740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:31:26,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965902208] [2021-07-09 17:31:26,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:26,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:26,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:26,749 INFO L87 Difference]: Start difference. First operand 1170 states and 3785 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:27,060 INFO L93 Difference]: Finished difference Result 1590 states and 4959 transitions. [2021-07-09 17:31:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:27,063 INFO L225 Difference]: With dead ends: 1590 [2021-07-09 17:31:27,063 INFO L226 Difference]: Without dead ends: 1531 [2021-07-09 17:31:27,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-07-09 17:31:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1173. [2021-07-09 17:31:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.237201365187713) internal successors, (3794), 1172 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3794 transitions. [2021-07-09 17:31:27,078 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3794 transitions. Word has length 24 [2021-07-09 17:31:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:27,078 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3794 transitions. [2021-07-09 17:31:27,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3794 transitions. [2021-07-09 17:31:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:27,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:27,080 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:27,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1639,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:27,280 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1105624278, now seen corresponding path program 211 times [2021-07-09 17:31:27,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:27,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824721597] [2021-07-09 17:31:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:27,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:27,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824721597] [2021-07-09 17:31:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824721597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593283706] [2021-07-09 17:31:27,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:27,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:27,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:27,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:27,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:27,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:27,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-07-09 17:31:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:27,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:27,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:27,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:27,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:27,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:27,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:27,679 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:27,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:27,690 INFO L518 ElimStorePlain]: Eliminatee v_prenex_799 vanished before elimination [2021-07-09 17:31:27,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:27,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:27 [2021-07-09 17:31:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:27,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593283706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:27,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:27,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439678103] [2021-07-09 17:31:27,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:27,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:27,759 INFO L87 Difference]: Start difference. First operand 1173 states and 3794 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,110 INFO L93 Difference]: Finished difference Result 1582 states and 4951 transitions. [2021-07-09 17:31:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:28,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,113 INFO L225 Difference]: With dead ends: 1582 [2021-07-09 17:31:28,113 INFO L226 Difference]: Without dead ends: 1547 [2021-07-09 17:31:28,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-07-09 17:31:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1171. [2021-07-09 17:31:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.2384615384615385) internal successors, (3789), 1170 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3789 transitions. [2021-07-09 17:31:28,128 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3789 transitions. Word has length 24 [2021-07-09 17:31:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,129 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3789 transitions. [2021-07-09 17:31:28,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3789 transitions. [2021-07-09 17:31:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:28,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,130 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:28,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1643 [2021-07-09 17:31:28,331 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1643117134, now seen corresponding path program 212 times [2021-07-09 17:31:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:28,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552853543] [2021-07-09 17:31:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:28,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:28,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552853543] [2021-07-09 17:31:28,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552853543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990179998] [2021-07-09 17:31:28,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:28,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:28,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:28,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:28,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:28,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:55 [2021-07-09 17:31:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:28,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:28,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,803 INFO L628 ElimStorePlain]: treesize reduction 45, result has 62.5 percent of original size [2021-07-09 17:31:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:31:28,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:28,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:28,831 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:28,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:28,834 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:28,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:28,855 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:28,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:31:28,856 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:133, output treesize:47 [2021-07-09 17:31:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:28,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990179998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:28,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:28,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088096714] [2021-07-09 17:31:28,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:28,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:28,937 INFO L87 Difference]: Start difference. First operand 1171 states and 3789 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:29,278 INFO L93 Difference]: Finished difference Result 1586 states and 4949 transitions. [2021-07-09 17:31:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:29,281 INFO L225 Difference]: With dead ends: 1586 [2021-07-09 17:31:29,281 INFO L226 Difference]: Without dead ends: 1533 [2021-07-09 17:31:29,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-07-09 17:31:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1173. [2021-07-09 17:31:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.237201365187713) internal successors, (3794), 1172 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3794 transitions. [2021-07-09 17:31:29,296 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3794 transitions. Word has length 24 [2021-07-09 17:31:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:29,296 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3794 transitions. [2021-07-09 17:31:29,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3794 transitions. [2021-07-09 17:31:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:29,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:29,297 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:29,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1647,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,498 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1151354824, now seen corresponding path program 213 times [2021-07-09 17:31:29,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:29,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274839480] [2021-07-09 17:31:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:29,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:29,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274839480] [2021-07-09 17:31:29,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274839480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457720794] [2021-07-09 17:31:29,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:29,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:29,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:29,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:29,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:31:29,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:29,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:29,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:29,954 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:29,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:29,957 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:29,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:29,960 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:29,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:29,964 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:29,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:29,999 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:117, output treesize:57 [2021-07-09 17:31:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457720794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:30,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:30,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641233664] [2021-07-09 17:31:30,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:30,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:30,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:30,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:30,102 INFO L87 Difference]: Start difference. First operand 1173 states and 3794 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,685 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-07-09 17:31:30,966 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-07-09 17:31:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:31,262 INFO L93 Difference]: Finished difference Result 1948 states and 5984 transitions. [2021-07-09 17:31:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:31,265 INFO L225 Difference]: With dead ends: 1948 [2021-07-09 17:31:31,265 INFO L226 Difference]: Without dead ends: 1860 [2021-07-09 17:31:31,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1190.4ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-07-09 17:31:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1175. [2021-07-09 17:31:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.2402044293015333) internal successors, (3804), 1174 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3804 transitions. [2021-07-09 17:31:31,285 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3804 transitions. Word has length 24 [2021-07-09 17:31:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:31,285 INFO L482 AbstractCegarLoop]: Abstraction has 1175 states and 3804 transitions. [2021-07-09 17:31:31,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3804 transitions. [2021-07-09 17:31:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:31,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:31,286 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:31,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-07-09 17:31:31,488 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash -661081872, now seen corresponding path program 214 times [2021-07-09 17:31:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:31,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722036419] [2021-07-09 17:31:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:31,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:31,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722036419] [2021-07-09 17:31:31,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722036419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046603512] [2021-07-09 17:31:31,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:31,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:31,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:31,897 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-07-09 17:31:31,981 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:31:31,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:31,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:31,992 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:31,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-07-09 17:31:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:32,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046603512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:32,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:31:32,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515935839] [2021-07-09 17:31:32,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:32,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:32,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:32,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:32,018 INFO L87 Difference]: Start difference. First operand 1175 states and 3804 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:32,422 INFO L93 Difference]: Finished difference Result 1551 states and 4890 transitions. [2021-07-09 17:31:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:32,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:32,425 INFO L225 Difference]: With dead ends: 1551 [2021-07-09 17:31:32,425 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 17:31:32,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 17:31:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1180. [2021-07-09 17:31:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.238337574215437) internal successors, (3818), 1179 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3818 transitions. [2021-07-09 17:31:32,446 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3818 transitions. Word has length 24 [2021-07-09 17:31:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:32,446 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3818 transitions. [2021-07-09 17:31:32,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3818 transitions. [2021-07-09 17:31:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:32,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:32,447 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1655,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,648 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1895913608, now seen corresponding path program 215 times [2021-07-09 17:31:32,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113037340] [2021-07-09 17:31:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:32,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:32,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113037340] [2021-07-09 17:31:32,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113037340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783470770] [2021-07-09 17:31:32,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:33,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:33,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:33,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:33,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:33,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:55 [2021-07-09 17:31:33,122 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_807], 1=[o_4, v_prenex_808]} [2021-07-09 17:31:33,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:33,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:33,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:33,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:33,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:33,169 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:33,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:33,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:31:33,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:33,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:33,208 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-07-09 17:31:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:33,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783470770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:33,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:33,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511506909] [2021-07-09 17:31:33,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:33,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:33,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:33,282 INFO L87 Difference]: Start difference. First operand 1180 states and 3818 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,812 INFO L93 Difference]: Finished difference Result 1583 states and 4970 transitions. [2021-07-09 17:31:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,815 INFO L225 Difference]: With dead ends: 1583 [2021-07-09 17:31:33,815 INFO L226 Difference]: Without dead ends: 1548 [2021-07-09 17:31:33,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-07-09 17:31:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1178. [2021-07-09 17:31:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.2395921835174173) internal successors, (3813), 1177 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3813 transitions. [2021-07-09 17:31:33,830 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3813 transitions. Word has length 24 [2021-07-09 17:31:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,830 INFO L482 AbstractCegarLoop]: Abstraction has 1178 states and 3813 transitions. [2021-07-09 17:31:33,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3813 transitions. [2021-07-09 17:31:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:33,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,832 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:34,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-07-09 17:31:34,032 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:34,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1358420752, now seen corresponding path program 216 times [2021-07-09 17:31:34,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:34,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079279890] [2021-07-09 17:31:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:34,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079279890] [2021-07-09 17:31:34,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079279890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576874777] [2021-07-09 17:31:34,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:34,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:34,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:34,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:31:34,454 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_810], 1=[v_prenex_811, o_2]} [2021-07-09 17:31:34,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:34,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:34,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:34,558 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:34,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:34,562 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:34,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:34,607 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:34,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:34,611 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:34,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:34,651 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-07-09 17:31:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:34,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576874777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:34,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:34,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765205125] [2021-07-09 17:31:34,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:34,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:34,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:34,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:34,758 INFO L87 Difference]: Start difference. First operand 1178 states and 3813 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,285 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-07-09 17:31:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:35,659 INFO L93 Difference]: Finished difference Result 1657 states and 5191 transitions. [2021-07-09 17:31:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:35,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:35,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:35,662 INFO L225 Difference]: With dead ends: 1657 [2021-07-09 17:31:35,662 INFO L226 Difference]: Without dead ends: 1573 [2021-07-09 17:31:35,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 885.7ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-07-09 17:31:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1176. [2021-07-09 17:31:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.2408510638297874) internal successors, (3808), 1175 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3808 transitions. [2021-07-09 17:31:35,678 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3808 transitions. Word has length 24 [2021-07-09 17:31:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:35,678 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 3808 transitions. [2021-07-09 17:31:35,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3808 transitions. [2021-07-09 17:31:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:35,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:35,679 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:35,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1669 [2021-07-09 17:31:35,880 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:35,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:35,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1549784174, now seen corresponding path program 217 times [2021-07-09 17:31:35,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:35,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119460616] [2021-07-09 17:31:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:36,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:36,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119460616] [2021-07-09 17:31:36,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119460616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954355204] [2021-07-09 17:31:36,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:36,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:36,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:36,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:36,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:36,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:36,360 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:31:36,535 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:31:36,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:36,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:31:36,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:11 [2021-07-09 17:31:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:36,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954355204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:36,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:36,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476787728] [2021-07-09 17:31:36,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:36,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:36,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:36,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:36,590 INFO L87 Difference]: Start difference. First operand 1176 states and 3808 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:37,419 INFO L93 Difference]: Finished difference Result 1640 states and 5119 transitions. [2021-07-09 17:31:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:37,422 INFO L225 Difference]: With dead ends: 1640 [2021-07-09 17:31:37,422 INFO L226 Difference]: Without dead ends: 1582 [2021-07-09 17:31:37,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 871.0ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-07-09 17:31:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1191. [2021-07-09 17:31:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.2403361344537815) internal successors, (3856), 1190 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3856 transitions. [2021-07-09 17:31:37,439 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3856 transitions. Word has length 24 [2021-07-09 17:31:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:37,439 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3856 transitions. [2021-07-09 17:31:37,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3856 transitions. [2021-07-09 17:31:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:37,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:37,441 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:37,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:37,641 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:37,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1007211306, now seen corresponding path program 218 times [2021-07-09 17:31:37,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:37,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413780796] [2021-07-09 17:31:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:37,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:37,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413780796] [2021-07-09 17:31:37,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413780796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732773257] [2021-07-09 17:31:37,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:37,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:37,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:37,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:37,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:37,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:37,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:31:38,092 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_817], 1=[o_4, v_prenex_818]} [2021-07-09 17:31:38,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:38,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:38,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:38,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:38,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:38,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:38,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:38,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:38,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:38,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:38,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:38,197 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:38,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:38,201 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:38,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:38,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:38,245 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:38,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:38,249 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:38,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:38,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:38,288 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-07-09 17:31:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:38,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732773257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:38,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971574331] [2021-07-09 17:31:38,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:38,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:38,397 INFO L87 Difference]: Start difference. First operand 1191 states and 3856 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:39,472 INFO L93 Difference]: Finished difference Result 1837 states and 5620 transitions. [2021-07-09 17:31:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:39,476 INFO L225 Difference]: With dead ends: 1837 [2021-07-09 17:31:39,476 INFO L226 Difference]: Without dead ends: 1730 [2021-07-09 17:31:39,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1087.6ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-09 17:31:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1189. [2021-07-09 17:31:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.241582491582492) internal successors, (3851), 1188 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3851 transitions. [2021-07-09 17:31:39,493 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3851 transitions. Word has length 24 [2021-07-09 17:31:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:39,493 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3851 transitions. [2021-07-09 17:31:39,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3851 transitions. [2021-07-09 17:31:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:39,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:39,495 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:39,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1688 [2021-07-09 17:31:39,695 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash 513457520, now seen corresponding path program 219 times [2021-07-09 17:31:39,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:39,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341651038] [2021-07-09 17:31:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:39,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:39,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341651038] [2021-07-09 17:31:39,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341651038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425617562] [2021-07-09 17:31:39,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:39,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:39,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:39,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:39,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:39,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:39,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:39,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:39,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:39,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:31:40,079 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:31:40,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:40,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:40,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:40,116 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:40,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:40,119 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:40,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:40,138 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-07-09 17:31:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:40,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425617562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:40,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159718928] [2021-07-09 17:31:40,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:40,195 INFO L87 Difference]: Start difference. First operand 1189 states and 3851 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:40,904 INFO L93 Difference]: Finished difference Result 1641 states and 5133 transitions. [2021-07-09 17:31:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:40,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:40,907 INFO L225 Difference]: With dead ends: 1641 [2021-07-09 17:31:40,907 INFO L226 Difference]: Without dead ends: 1550 [2021-07-09 17:31:40,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 640.8ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-07-09 17:31:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1177. [2021-07-09 17:31:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.241496598639456) internal successors, (3812), 1176 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3812 transitions. [2021-07-09 17:31:40,922 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3812 transitions. Word has length 24 [2021-07-09 17:31:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:40,922 INFO L482 AbstractCegarLoop]: Abstraction has 1177 states and 3812 transitions. [2021-07-09 17:31:40,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3812 transitions. [2021-07-09 17:31:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:40,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:40,923 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:41,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1707,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:41,124 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:41,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1908820380, now seen corresponding path program 220 times [2021-07-09 17:31:41,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:41,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417203242] [2021-07-09 17:31:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:41,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:41,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417203242] [2021-07-09 17:31:41,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417203242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425930970] [2021-07-09 17:31:41,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:41,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:41,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:41,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:41,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:41,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:41,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:41,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:41,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:41,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:49 [2021-07-09 17:31:41,508 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:31:41,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:41,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:41,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:41,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:41,538 INFO L628 ElimStorePlain]: treesize reduction 41, result has 38.8 percent of original size [2021-07-09 17:31:41,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:41,541 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:41,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:41,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:41,550 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-07-09 17:31:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:41,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425930970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:41,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:41,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418846684] [2021-07-09 17:31:41,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:41,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:41,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:41,591 INFO L87 Difference]: Start difference. First operand 1177 states and 3812 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:41,853 INFO L93 Difference]: Finished difference Result 1361 states and 4257 transitions. [2021-07-09 17:31:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:41,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:41,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:41,856 INFO L225 Difference]: With dead ends: 1361 [2021-07-09 17:31:41,856 INFO L226 Difference]: Without dead ends: 1288 [2021-07-09 17:31:41,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-09 17:31:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1182. [2021-07-09 17:31:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.2379339542760373) internal successors, (3824), 1181 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3824 transitions. [2021-07-09 17:31:41,869 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3824 transitions. Word has length 24 [2021-07-09 17:31:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:41,869 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3824 transitions. [2021-07-09 17:31:41,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3824 transitions. [2021-07-09 17:31:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:41,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:41,871 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:42,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1715,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,087 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:42,087 INFO L82 PathProgramCache]: Analyzing trace with hash -193439838, now seen corresponding path program 221 times [2021-07-09 17:31:42,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:42,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896373626] [2021-07-09 17:31:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:42,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896373626] [2021-07-09 17:31:42,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896373626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061047251] [2021-07-09 17:31:42,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:42,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:42,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:42,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:42,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:42,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:42,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:42,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:42,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:37 [2021-07-09 17:31:42,489 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:31:42,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:42,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:42,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:42,519 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:42,523 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:42,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:42,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:42,543 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-07-09 17:31:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:42,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061047251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:42,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:31:42,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570543957] [2021-07-09 17:31:42,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:42,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:42,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:42,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:42,594 INFO L87 Difference]: Start difference. First operand 1182 states and 3824 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:43,208 INFO L93 Difference]: Finished difference Result 1384 states and 4364 transitions. [2021-07-09 17:31:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:43,211 INFO L225 Difference]: With dead ends: 1384 [2021-07-09 17:31:43,211 INFO L226 Difference]: Without dead ends: 1325 [2021-07-09 17:31:43,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-07-09 17:31:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1182. [2021-07-09 17:31:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.2379339542760373) internal successors, (3824), 1181 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3824 transitions. [2021-07-09 17:31:43,224 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3824 transitions. Word has length 24 [2021-07-09 17:31:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:43,224 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3824 transitions. [2021-07-09 17:31:43,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3824 transitions. [2021-07-09 17:31:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:43,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:43,226 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:43,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1719,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:43,427 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:43,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1931411654, now seen corresponding path program 222 times [2021-07-09 17:31:43,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:43,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716619168] [2021-07-09 17:31:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:43,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:43,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716619168] [2021-07-09 17:31:43,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716619168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:43,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370798934] [2021-07-09 17:31:43,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:43,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:43,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:43,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:43,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:43,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:43,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:43,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:43,727 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:101 [2021-07-09 17:31:43,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:43,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,856 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:43,868 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:43,871 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:43,875 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:43,878 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,880 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:44,010 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-07-09 17:31:44,011 INFO L628 ElimStorePlain]: treesize reduction 101, result has 50.7 percent of original size [2021-07-09 17:31:44,011 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:44,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:44,012 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:425, output treesize:104 [2021-07-09 17:31:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:44,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370798934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:44,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:31:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028938166] [2021-07-09 17:31:44,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:44,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:44,162 INFO L87 Difference]: Start difference. First operand 1182 states and 3824 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,456 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-09 17:31:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:44,902 INFO L93 Difference]: Finished difference Result 1490 states and 4562 transitions. [2021-07-09 17:31:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:44,904 INFO L225 Difference]: With dead ends: 1490 [2021-07-09 17:31:44,904 INFO L226 Difference]: Without dead ends: 1359 [2021-07-09 17:31:44,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-07-09 17:31:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1198. [2021-07-09 17:31:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.2297410192147034) internal successors, (3866), 1197 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3866 transitions. [2021-07-09 17:31:44,919 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3866 transitions. Word has length 24 [2021-07-09 17:31:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:44,919 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3866 transitions. [2021-07-09 17:31:44,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3866 transitions. [2021-07-09 17:31:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:44,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:44,920 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:45,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1725,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,121 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1952730500, now seen corresponding path program 223 times [2021-07-09 17:31:45,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:45,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898687308] [2021-07-09 17:31:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:45,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898687308] [2021-07-09 17:31:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898687308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322203858] [2021-07-09 17:31:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:45,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:45,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:45,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:45,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-07-09 17:31:45,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:45,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:45,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:45,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:45,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,455 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-07-09 17:31:45,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:45,456 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:124 [2021-07-09 17:31:45,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:31:45,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:45,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:31:45,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:45,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,559 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-07-09 17:31:45,560 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:45,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,560 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:173, output treesize:15 [2021-07-09 17:31:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:45,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322203858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:45,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 17:31:45,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921197704] [2021-07-09 17:31:45,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:45,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:45,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:45,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:45,593 INFO L87 Difference]: Start difference. First operand 1198 states and 3866 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:45,766 INFO L93 Difference]: Finished difference Result 1298 states and 4106 transitions. [2021-07-09 17:31:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:45,768 INFO L225 Difference]: With dead ends: 1298 [2021-07-09 17:31:45,768 INFO L226 Difference]: Without dead ends: 1239 [2021-07-09 17:31:45,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-07-09 17:31:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1198. [2021-07-09 17:31:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.2297410192147034) internal successors, (3866), 1197 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3866 transitions. [2021-07-09 17:31:45,781 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3866 transitions. Word has length 24 [2021-07-09 17:31:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:45,782 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3866 transitions. [2021-07-09 17:31:45,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3866 transitions. [2021-07-09 17:31:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:45,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:45,783 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:45,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,983 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash 604264980, now seen corresponding path program 224 times [2021-07-09 17:31:45,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:45,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124206914] [2021-07-09 17:31:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:46,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:46,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124206914] [2021-07-09 17:31:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124206914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138175406] [2021-07-09 17:31:46,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:46,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:46,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:46,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:46,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:46,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:55 [2021-07-09 17:31:46,332 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_824, o_4], 1=[v_prenex_823, o_0]} [2021-07-09 17:31:46,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:46,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:46,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:46,378 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:46,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:31:46,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:46,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-07-09 17:31:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:46,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138175406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:46,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:46,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761103450] [2021-07-09 17:31:46,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:46,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:46,482 INFO L87 Difference]: Start difference. First operand 1198 states and 3866 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:46,690 INFO L93 Difference]: Finished difference Result 1290 states and 4098 transitions. [2021-07-09 17:31:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:46,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:46,693 INFO L225 Difference]: With dead ends: 1290 [2021-07-09 17:31:46,693 INFO L226 Difference]: Without dead ends: 1255 [2021-07-09 17:31:46,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-07-09 17:31:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1198. [2021-07-09 17:31:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.2297410192147034) internal successors, (3866), 1197 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3866 transitions. [2021-07-09 17:31:46,707 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3866 transitions. Word has length 24 [2021-07-09 17:31:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:46,707 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3866 transitions. [2021-07-09 17:31:46,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3866 transitions. [2021-07-09 17:31:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:46,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:46,708 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:46,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1734,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:46,909 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash 66772124, now seen corresponding path program 225 times [2021-07-09 17:31:46,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:46,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415081948] [2021-07-09 17:31:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:47,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:47,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415081948] [2021-07-09 17:31:47,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415081948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811809391] [2021-07-09 17:31:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:47,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:47,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:47,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:47,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:47,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:47,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:47,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-07-09 17:31:47,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:47,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:47,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:47,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:47,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:47,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:47,296 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:47,300 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:47,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:47,304 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:47,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:47,308 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:47,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:47,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:47,345 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:141, output treesize:57 [2021-07-09 17:31:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:47,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811809391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:47,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:47,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670866854] [2021-07-09 17:31:47,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:47,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:47,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:47,441 INFO L87 Difference]: Start difference. First operand 1198 states and 3866 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:48,165 INFO L93 Difference]: Finished difference Result 1393 states and 4399 transitions. [2021-07-09 17:31:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:48,167 INFO L225 Difference]: With dead ends: 1393 [2021-07-09 17:31:48,167 INFO L226 Difference]: Without dead ends: 1305 [2021-07-09 17:31:48,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 657.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-07-09 17:31:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1204. [2021-07-09 17:31:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.229426433915212) internal successors, (3885), 1203 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 3885 transitions. [2021-07-09 17:31:48,181 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 3885 transitions. Word has length 24 [2021-07-09 17:31:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:48,181 INFO L482 AbstractCegarLoop]: Abstraction has 1204 states and 3885 transitions. [2021-07-09 17:31:48,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 3885 transitions. [2021-07-09 17:31:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:48,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:48,182 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:48,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1740 [2021-07-09 17:31:48,383 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash 128852794, now seen corresponding path program 226 times [2021-07-09 17:31:48,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:48,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596287598] [2021-07-09 17:31:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:48,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596287598] [2021-07-09 17:31:48,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596287598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635525198] [2021-07-09 17:31:48,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:48,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:48,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:48,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:48,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:48,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:48,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:48,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:48,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:48,706 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-07-09 17:31:48,880 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:31:48,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:48,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:48,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,908 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-07-09 17:31:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:31:48,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,918 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-07-09 17:31:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:48,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635525198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:48,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:48,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464776387] [2021-07-09 17:31:48,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:48,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:48,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:48,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:48,952 INFO L87 Difference]: Start difference. First operand 1204 states and 3885 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:49,536 INFO L93 Difference]: Finished difference Result 1696 states and 5132 transitions. [2021-07-09 17:31:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:49,539 INFO L225 Difference]: With dead ends: 1696 [2021-07-09 17:31:49,539 INFO L226 Difference]: Without dead ends: 1596 [2021-07-09 17:31:49,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 663.1ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-07-09 17:31:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1219. [2021-07-09 17:31:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.2274220032840724) internal successors, (3931), 1218 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3931 transitions. [2021-07-09 17:31:49,556 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3931 transitions. Word has length 24 [2021-07-09 17:31:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:49,556 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 3931 transitions. [2021-07-09 17:31:49,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3931 transitions. [2021-07-09 17:31:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:49,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:49,557 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:49,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:49,758 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:49,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1973407424, now seen corresponding path program 227 times [2021-07-09 17:31:49,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:49,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389057442] [2021-07-09 17:31:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:49,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:49,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389057442] [2021-07-09 17:31:49,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389057442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:49,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283756615] [2021-07-09 17:31:49,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:49,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:49,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:49,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:49,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:49,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:49,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:49,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:49,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:49,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:49,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:49,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:49,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:49,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:43 [2021-07-09 17:31:50,190 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:31:50,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:50,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:50,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:50,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:50,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:50,222 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:50,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:50,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:50,241 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-07-09 17:31:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:50,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283756615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:50,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:50,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748454308] [2021-07-09 17:31:50,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:50,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:50,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:50,293 INFO L87 Difference]: Start difference. First operand 1219 states and 3931 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:51,547 INFO L93 Difference]: Finished difference Result 1646 states and 5062 transitions. [2021-07-09 17:31:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:51,550 INFO L225 Difference]: With dead ends: 1646 [2021-07-09 17:31:51,550 INFO L226 Difference]: Without dead ends: 1560 [2021-07-09 17:31:51,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:31:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-07-09 17:31:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1232. [2021-07-09 17:31:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.2282696994313564) internal successors, (3974), 1231 states have internal predecessors, (3974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3974 transitions. [2021-07-09 17:31:51,566 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3974 transitions. Word has length 24 [2021-07-09 17:31:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:51,566 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 3974 transitions. [2021-07-09 17:31:51,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3974 transitions. [2021-07-09 17:31:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:51,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:51,568 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:51,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1752,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:51,768 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:51,768 INFO L82 PathProgramCache]: Analyzing trace with hash 583588056, now seen corresponding path program 228 times [2021-07-09 17:31:51,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:51,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741054400] [2021-07-09 17:31:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:51,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:51,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741054400] [2021-07-09 17:31:51,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741054400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:51,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176802851] [2021-07-09 17:31:51,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:51,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:51,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:52,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:52,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:52,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:52,058 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:43 [2021-07-09 17:31:52,197 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_831], 1=[o_0, v_prenex_830]} [2021-07-09 17:31:52,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:52,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:52,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:52,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:52,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:52,309 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:52,313 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:52,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:52,359 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:52,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:52,363 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:52,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:52,403 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-07-09 17:31:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:52,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176802851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:52,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:52,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:52,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494221722] [2021-07-09 17:31:52,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:52,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:52,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:52,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:52,502 INFO L87 Difference]: Start difference. First operand 1232 states and 3974 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:54,004 INFO L93 Difference]: Finished difference Result 1773 states and 5385 transitions. [2021-07-09 17:31:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:54,007 INFO L225 Difference]: With dead ends: 1773 [2021-07-09 17:31:54,008 INFO L226 Difference]: Without dead ends: 1642 [2021-07-09 17:31:54,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1420.1ms TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:31:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-07-09 17:31:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1231. [2021-07-09 17:31:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 3.243089430894309) internal successors, (3989), 1230 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3989 transitions. [2021-07-09 17:31:54,024 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3989 transitions. Word has length 24 [2021-07-09 17:31:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:54,024 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 3989 transitions. [2021-07-09 17:31:54,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3989 transitions. [2021-07-09 17:31:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:54,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:54,025 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:54,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1765 [2021-07-09 17:31:54,226 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:54,226 INFO L82 PathProgramCache]: Analyzing trace with hash 294542010, now seen corresponding path program 229 times [2021-07-09 17:31:54,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:54,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690262711] [2021-07-09 17:31:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:31:54,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690262711] [2021-07-09 17:31:54,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690262711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010740169] [2021-07-09 17:31:54,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:54,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:54,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:54,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:54,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:54,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:54,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:54,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:54,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:54,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:54,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:54,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:54,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:54,502 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-07-09 17:31:54,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:31:54,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:31:54,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:31:54,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:31:54,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,688 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-07-09 17:31:54,688 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:54,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:54,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-07-09 17:31:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:31:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010740169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:54,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:31:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512137171] [2021-07-09 17:31:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:54,723 INFO L87 Difference]: Start difference. First operand 1231 states and 3989 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:55,003 INFO L93 Difference]: Finished difference Result 1553 states and 4809 transitions. [2021-07-09 17:31:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:55,006 INFO L225 Difference]: With dead ends: 1553 [2021-07-09 17:31:55,007 INFO L226 Difference]: Without dead ends: 1468 [2021-07-09 17:31:55,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-07-09 17:31:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1230. [2021-07-09 17:31:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.237591537835639) internal successors, (3979), 1229 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3979 transitions. [2021-07-09 17:31:55,022 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3979 transitions. Word has length 24 [2021-07-09 17:31:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:55,023 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 3979 transitions. [2021-07-09 17:31:55,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3979 transitions. [2021-07-09 17:31:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:55,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:55,024 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:55,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-07-09 17:31:55,225 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash -679322886, now seen corresponding path program 230 times [2021-07-09 17:31:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:55,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633443911] [2021-07-09 17:31:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:55,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633443911] [2021-07-09 17:31:55,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633443911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639853026] [2021-07-09 17:31:55,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:55,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:55,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:55,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:55,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:55,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:55,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-07-09 17:31:55,714 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:31:55,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:55,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:55,726 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:55,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-07-09 17:31:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:55,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639853026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:55,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:55,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385940804] [2021-07-09 17:31:55,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:55,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:55,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:55,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:55,768 INFO L87 Difference]: Start difference. First operand 1230 states and 3979 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:56,191 INFO L93 Difference]: Finished difference Result 1556 states and 4896 transitions. [2021-07-09 17:31:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:56,194 INFO L225 Difference]: With dead ends: 1556 [2021-07-09 17:31:56,194 INFO L226 Difference]: Without dead ends: 1479 [2021-07-09 17:31:56,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-07-09 17:31:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1230. [2021-07-09 17:31:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.237591537835639) internal successors, (3979), 1229 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3979 transitions. [2021-07-09 17:31:56,209 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3979 transitions. Word has length 24 [2021-07-09 17:31:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:56,209 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 3979 transitions. [2021-07-09 17:31:56,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3979 transitions. [2021-07-09 17:31:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:56,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:56,211 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:56,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-07-09 17:31:56,411 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1887548576, now seen corresponding path program 231 times [2021-07-09 17:31:56,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:56,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019916516] [2021-07-09 17:31:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:56,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019916516] [2021-07-09 17:31:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019916516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385877352] [2021-07-09 17:31:56,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:56,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:56,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:56,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:56,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:56,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:56,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:56,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:56,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:31:56,696 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-07-09 17:31:56,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:56,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:56,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:56,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:56,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:56,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:56,904 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:56,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:56,907 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:56,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:56,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:56,932 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:31:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:31:56,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385877352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:56,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:56,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303691782] [2021-07-09 17:31:56,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:56,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:56,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:56,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:56,996 INFO L87 Difference]: Start difference. First operand 1230 states and 3979 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:57,935 INFO L93 Difference]: Finished difference Result 1573 states and 4934 transitions. [2021-07-09 17:31:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:57,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:31:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:57,938 INFO L225 Difference]: With dead ends: 1573 [2021-07-09 17:31:57,938 INFO L226 Difference]: Without dead ends: 1490 [2021-07-09 17:31:57,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-07-09 17:31:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1218. [2021-07-09 17:31:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.23746918652424) internal successors, (3940), 1217 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3940 transitions. [2021-07-09 17:31:57,954 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3940 transitions. Word has length 24 [2021-07-09 17:31:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:57,954 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3940 transitions. [2021-07-09 17:31:57,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3940 transitions. [2021-07-09 17:31:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:31:57,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:57,955 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:58,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1788,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:58,156 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:58,156 INFO L82 PathProgramCache]: Analyzing trace with hash 658620504, now seen corresponding path program 232 times [2021-07-09 17:31:58,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:58,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046245012] [2021-07-09 17:31:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:31:58,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:58,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046245012] [2021-07-09 17:31:58,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046245012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460675047] [2021-07-09 17:31:58,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:58,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:58,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:58,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:58,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:58,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:58,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:58,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:58,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:58,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:31:58,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:58,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:58,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,016 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2021-07-09 17:31:59,017 INFO L628 ElimStorePlain]: treesize reduction 175, result has 57.4 percent of original size [2021-07-09 17:31:59,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:59,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:31:59,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:59,128 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:31:59,134 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:59,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:59,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:59,328 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:59,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,414 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:31:59,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:59,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:31:59,507 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:59,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:31:59,592 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:425, output treesize:105 [2021-07-09 17:31:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:31:59,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460675047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:59,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:59,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026621522] [2021-07-09 17:31:59,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:59,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:59,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:59,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:59,738 INFO L87 Difference]: Start difference. First operand 1218 states and 3940 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,152 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-07-09 17:32:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:00,925 INFO L93 Difference]: Finished difference Result 1747 states and 5400 transitions. [2021-07-09 17:32:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:00,928 INFO L225 Difference]: With dead ends: 1747 [2021-07-09 17:32:00,928 INFO L226 Difference]: Without dead ends: 1660 [2021-07-09 17:32:00,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1161.8ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-07-09 17:32:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1214. [2021-07-09 17:32:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.2308326463314097) internal successors, (3919), 1213 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3919 transitions. [2021-07-09 17:32:00,944 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3919 transitions. Word has length 24 [2021-07-09 17:32:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:00,944 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 3919 transitions. [2021-07-09 17:32:00,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3919 transitions. [2021-07-09 17:32:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:00,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:00,946 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:01,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1799 [2021-07-09 17:32:01,146 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash -897345318, now seen corresponding path program 233 times [2021-07-09 17:32:01,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:01,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816365247] [2021-07-09 17:32:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:01,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816365247] [2021-07-09 17:32:01,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816365247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396140001] [2021-07-09 17:32:01,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:01,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:01,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:01,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:01,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:01,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:01,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:59 [2021-07-09 17:32:01,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:01,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:01,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:01,616 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:01,619 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:01,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:01,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:01,646 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:32:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:01,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396140001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:01,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:01,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050955331] [2021-07-09 17:32:01,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:01,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:01,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:01,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:01,708 INFO L87 Difference]: Start difference. First operand 1214 states and 3919 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:02,325 INFO L93 Difference]: Finished difference Result 1348 states and 4286 transitions. [2021-07-09 17:32:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:02,327 INFO L225 Difference]: With dead ends: 1348 [2021-07-09 17:32:02,327 INFO L226 Difference]: Without dead ends: 1289 [2021-07-09 17:32:02,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-07-09 17:32:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1214. [2021-07-09 17:32:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.2308326463314097) internal successors, (3919), 1213 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3919 transitions. [2021-07-09 17:32:02,341 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3919 transitions. Word has length 24 [2021-07-09 17:32:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:02,341 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 3919 transitions. [2021-07-09 17:32:02,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3919 transitions. [2021-07-09 17:32:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:02,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:02,343 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:02,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1807,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:02,543 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1659650162, now seen corresponding path program 234 times [2021-07-09 17:32:02,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:02,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382388901] [2021-07-09 17:32:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:02,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:02,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382388901] [2021-07-09 17:32:02,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382388901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520021296] [2021-07-09 17:32:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:02,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:02,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:02,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:32:02,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:02,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:02,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:02,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:02,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-09 17:32:03,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:03,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:03,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,135 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-09 17:32:03,135 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.1 percent of original size [2021-07-09 17:32:03,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:32:03,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:03,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:03,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:03,191 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:03,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:03,238 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:03,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:03,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:03,281 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:189, output treesize:47 [2021-07-09 17:32:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:03,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520021296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:03,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:03,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881248462] [2021-07-09 17:32:03,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:03,362 INFO L87 Difference]: Start difference. First operand 1214 states and 3919 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:03,632 INFO L93 Difference]: Finished difference Result 1308 states and 4142 transitions. [2021-07-09 17:32:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:03,635 INFO L225 Difference]: With dead ends: 1308 [2021-07-09 17:32:03,635 INFO L226 Difference]: Without dead ends: 1259 [2021-07-09 17:32:03,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-07-09 17:32:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1214. [2021-07-09 17:32:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.2308326463314097) internal successors, (3919), 1213 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3919 transitions. [2021-07-09 17:32:03,649 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3919 transitions. Word has length 24 [2021-07-09 17:32:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:03,649 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 3919 transitions. [2021-07-09 17:32:03,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3919 transitions. [2021-07-09 17:32:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:03,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:03,650 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:03,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:03,853 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1786047620, now seen corresponding path program 235 times [2021-07-09 17:32:03,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:03,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668532522] [2021-07-09 17:32:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:04,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668532522] [2021-07-09 17:32:04,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668532522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228828466] [2021-07-09 17:32:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:32:04,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:04,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:04,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:04,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:04,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:04,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:04,301 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:04,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:04,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:04,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,588 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-07-09 17:32:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:04,592 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:04,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,602 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-07-09 17:32:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:04,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228828466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:04,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:04,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306755520] [2021-07-09 17:32:04,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:04,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:04,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:04,642 INFO L87 Difference]: Start difference. First operand 1214 states and 3919 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:05,124 INFO L93 Difference]: Finished difference Result 1354 states and 4267 transitions. [2021-07-09 17:32:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:05,127 INFO L225 Difference]: With dead ends: 1354 [2021-07-09 17:32:05,127 INFO L226 Difference]: Without dead ends: 1283 [2021-07-09 17:32:05,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-07-09 17:32:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1219. [2021-07-09 17:32:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.2348111658456484) internal successors, (3940), 1218 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3940 transitions. [2021-07-09 17:32:05,141 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3940 transitions. Word has length 24 [2021-07-09 17:32:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:05,141 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 3940 transitions. [2021-07-09 17:32:05,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3940 transitions. [2021-07-09 17:32:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:05,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:05,142 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:05,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1824,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:05,343 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:05,343 INFO L82 PathProgramCache]: Analyzing trace with hash 770947860, now seen corresponding path program 236 times [2021-07-09 17:32:05,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:05,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26373030] [2021-07-09 17:32:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:05,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:05,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26373030] [2021-07-09 17:32:05,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26373030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196933951] [2021-07-09 17:32:05,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:05,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:05,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:32:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:05,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:05,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:05,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:05,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:05,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:05,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:05,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:05,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:05,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:05,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:06,097 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-09 17:32:06,098 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.1 percent of original size [2021-07-09 17:32:06,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:06,102 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:06,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:06,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:32:06,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:06,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:06,159 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:06,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:06,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:06,208 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:06,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:06,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:06,252 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:189, output treesize:47 [2021-07-09 17:32:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:06,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196933951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:06,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:06,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649277124] [2021-07-09 17:32:06,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:06,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:06,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:06,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:06,340 INFO L87 Difference]: Start difference. First operand 1219 states and 3940 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:06,728 INFO L93 Difference]: Finished difference Result 1420 states and 4412 transitions. [2021-07-09 17:32:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:06,731 INFO L225 Difference]: With dead ends: 1420 [2021-07-09 17:32:06,731 INFO L226 Difference]: Without dead ends: 1332 [2021-07-09 17:32:06,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 559.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-09 17:32:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1221. [2021-07-09 17:32:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.2336065573770494) internal successors, (3945), 1220 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3945 transitions. [2021-07-09 17:32:06,745 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3945 transitions. Word has length 24 [2021-07-09 17:32:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:06,746 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3945 transitions. [2021-07-09 17:32:06,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3945 transitions. [2021-07-09 17:32:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:06,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:06,747 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:06,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1835,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:06,948 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:06,948 INFO L82 PathProgramCache]: Analyzing trace with hash 990243836, now seen corresponding path program 237 times [2021-07-09 17:32:06,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:06,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846380150] [2021-07-09 17:32:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:07,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846380150] [2021-07-09 17:32:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846380150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296750372] [2021-07-09 17:32:07,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:07,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:07,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:07,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:07,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:07,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:07,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:07,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:07,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-07-09 17:32:07,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:07,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:07,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:07,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:07,494 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:07,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:07,498 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:07,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:07,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:07,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:32:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:07,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296750372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:07,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:07,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436207293] [2021-07-09 17:32:07,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:07,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:07,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:07,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:07,586 INFO L87 Difference]: Start difference. First operand 1221 states and 3945 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:08,130 INFO L93 Difference]: Finished difference Result 1344 states and 4254 transitions. [2021-07-09 17:32:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:08,133 INFO L225 Difference]: With dead ends: 1344 [2021-07-09 17:32:08,133 INFO L226 Difference]: Without dead ends: 1289 [2021-07-09 17:32:08,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-07-09 17:32:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1222. [2021-07-09 17:32:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.23013923013923) internal successors, (3944), 1221 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3944 transitions. [2021-07-09 17:32:08,146 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3944 transitions. Word has length 24 [2021-07-09 17:32:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:08,146 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 3944 transitions. [2021-07-09 17:32:08,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3944 transitions. [2021-07-09 17:32:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:08,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:08,148 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:08,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1844,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,348 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1043392644, now seen corresponding path program 238 times [2021-07-09 17:32:08,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:08,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539252705] [2021-07-09 17:32:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:08,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539252705] [2021-07-09 17:32:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539252705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488949059] [2021-07-09 17:32:08,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:08,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:08,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:08,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:08,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:08,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:08,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:08,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:08,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:08,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:09,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:09,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:09,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:09,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:09,085 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:09,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:09,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:09,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:09,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:09,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:09,149 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:09,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:09,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:09,176 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:34 [2021-07-09 17:32:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:09,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488949059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:09,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:09,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588298865] [2021-07-09 17:32:09,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:09,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:09,250 INFO L87 Difference]: Start difference. First operand 1222 states and 3944 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:09,597 INFO L93 Difference]: Finished difference Result 1356 states and 4328 transitions. [2021-07-09 17:32:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:09,599 INFO L225 Difference]: With dead ends: 1356 [2021-07-09 17:32:09,599 INFO L226 Difference]: Without dead ends: 1310 [2021-07-09 17:32:09,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 563.0ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-07-09 17:32:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1215. [2021-07-09 17:32:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.231466227347611) internal successors, (3923), 1214 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3923 transitions. [2021-07-09 17:32:09,613 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3923 transitions. Word has length 24 [2021-07-09 17:32:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:09,613 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3923 transitions. [2021-07-09 17:32:09,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3923 transitions. [2021-07-09 17:32:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:09,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:09,614 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:09,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1855,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:09,815 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1217284814, now seen corresponding path program 239 times [2021-07-09 17:32:09,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:09,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312156650] [2021-07-09 17:32:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:09,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:09,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312156650] [2021-07-09 17:32:09,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312156650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:09,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966742939] [2021-07-09 17:32:09,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:10,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:32:10,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:10,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:10,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:10,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:10,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:10,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:10,213 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:10,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:10,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:10,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:10,491 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:10,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:10,566 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:10,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:10,634 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:10,699 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:10,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:10,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:10,825 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:10,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:10,889 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:81 [2021-07-09 17:32:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966742939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:10,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:10,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031406284] [2021-07-09 17:32:10,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:10,995 INFO L87 Difference]: Start difference. First operand 1215 states and 3923 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:11,384 INFO L93 Difference]: Finished difference Result 1441 states and 4530 transitions. [2021-07-09 17:32:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:11,387 INFO L225 Difference]: With dead ends: 1441 [2021-07-09 17:32:11,387 INFO L226 Difference]: Without dead ends: 1394 [2021-07-09 17:32:11,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-07-09 17:32:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1220. [2021-07-09 17:32:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.239540607054963) internal successors, (3949), 1219 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3949 transitions. [2021-07-09 17:32:11,402 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3949 transitions. Word has length 24 [2021-07-09 17:32:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:11,402 INFO L482 AbstractCegarLoop]: Abstraction has 1220 states and 3949 transitions. [2021-07-09 17:32:11,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3949 transitions. [2021-07-09 17:32:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:11,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:11,404 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:11,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-07-09 17:32:11,609 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2097558350, now seen corresponding path program 240 times [2021-07-09 17:32:11,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:11,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4025224] [2021-07-09 17:32:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:11,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:11,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4025224] [2021-07-09 17:32:11,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4025224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3531884] [2021-07-09 17:32:11,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:11,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:11,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:11,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:11,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:11,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:11,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:12,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:12,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:12,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:12,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:12,302 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:12,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:12,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:12,437 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:12,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:12,503 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:12,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:12,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:12,627 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:12,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:12,684 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:81 [2021-07-09 17:32:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:12,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3531884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:12,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:12,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169488760] [2021-07-09 17:32:12,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:12,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:12,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:12,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:12,791 INFO L87 Difference]: Start difference. First operand 1220 states and 3949 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:13,052 INFO L93 Difference]: Finished difference Result 1402 states and 4436 transitions. [2021-07-09 17:32:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:13,055 INFO L225 Difference]: With dead ends: 1402 [2021-07-09 17:32:13,055 INFO L226 Difference]: Without dead ends: 1383 [2021-07-09 17:32:13,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-07-09 17:32:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1215. [2021-07-09 17:32:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.231466227347611) internal successors, (3923), 1214 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3923 transitions. [2021-07-09 17:32:13,069 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3923 transitions. Word has length 24 [2021-07-09 17:32:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:13,069 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3923 transitions. [2021-07-09 17:32:13,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3923 transitions. [2021-07-09 17:32:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:13,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:13,071 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:13,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,272 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:13,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1943123386, now seen corresponding path program 241 times [2021-07-09 17:32:13,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:13,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701032705] [2021-07-09 17:32:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:13,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:13,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701032705] [2021-07-09 17:32:13,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701032705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063276956] [2021-07-09 17:32:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:13,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:32:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:13,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:32:13,871 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-07-09 17:32:13,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:13,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:13,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:13,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:13,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,913 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:14,127 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-09 17:32:14,127 INFO L628 ElimStorePlain]: treesize reduction 172, result has 54.1 percent of original size [2021-07-09 17:32:14,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:14,133 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:14,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:14,138 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:14,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:14,143 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:14,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:14,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:32:14,226 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:111 [2021-07-09 17:32:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:14,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063276956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:14,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:14,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:14,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206396075] [2021-07-09 17:32:14,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:14,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:14,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:14,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:14,368 INFO L87 Difference]: Start difference. First operand 1215 states and 3923 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,585 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-07-09 17:32:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:14,998 INFO L93 Difference]: Finished difference Result 1462 states and 4584 transitions. [2021-07-09 17:32:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:15,002 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:32:15,003 INFO L226 Difference]: Without dead ends: 1366 [2021-07-09 17:32:15,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 751.8ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:15,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-07-09 17:32:15,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1222. [2021-07-09 17:32:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.2383292383292384) internal successors, (3954), 1221 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3954 transitions. [2021-07-09 17:32:15,017 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3954 transitions. Word has length 24 [2021-07-09 17:32:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:15,017 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 3954 transitions. [2021-07-09 17:32:15,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3954 transitions. [2021-07-09 17:32:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:15,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:15,019 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:15,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1887,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:15,219 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1062849850, now seen corresponding path program 242 times [2021-07-09 17:32:15,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:15,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117118107] [2021-07-09 17:32:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:15,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:15,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117118107] [2021-07-09 17:32:15,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117118107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351749007] [2021-07-09 17:32:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:15,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:15,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:15,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:15,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:32:15,615 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:32:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:15,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:15,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:15,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:15,703 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:15,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:15,708 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:15,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:15,712 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:15,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:15,717 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:15,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:15,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:15,780 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-07-09 17:32:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:15,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351749007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:15,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:15,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692111450] [2021-07-09 17:32:15,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:15,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:15,898 INFO L87 Difference]: Start difference. First operand 1222 states and 3954 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:16,633 INFO L93 Difference]: Finished difference Result 1594 states and 4944 transitions. [2021-07-09 17:32:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:16,636 INFO L225 Difference]: With dead ends: 1594 [2021-07-09 17:32:16,636 INFO L226 Difference]: Without dead ends: 1498 [2021-07-09 17:32:16,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-07-09 17:32:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1213. [2021-07-09 17:32:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 3.232673267326733) internal successors, (3918), 1212 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 3918 transitions. [2021-07-09 17:32:16,651 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 3918 transitions. Word has length 24 [2021-07-09 17:32:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:16,651 INFO L482 AbstractCegarLoop]: Abstraction has 1213 states and 3918 transitions. [2021-07-09 17:32:16,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 3918 transitions. [2021-07-09 17:32:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:16,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:16,653 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:16,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1895 [2021-07-09 17:32:16,853 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1091951062, now seen corresponding path program 243 times [2021-07-09 17:32:16,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:16,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219439014] [2021-07-09 17:32:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:17,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:17,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219439014] [2021-07-09 17:32:17,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219439014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871182268] [2021-07-09 17:32:17,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:17,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:17,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:17,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:17,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:17,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:17,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:17,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:17,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:17,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:17,114 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-07-09 17:32:17,251 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:32:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:17,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:17,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:17,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:17,280 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:17,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:17,284 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:17,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:17,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:17,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-07-09 17:32:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:17,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871182268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:17,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:17,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575459043] [2021-07-09 17:32:17,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:17,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:17,353 INFO L87 Difference]: Start difference. First operand 1213 states and 3918 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:18,540 INFO L93 Difference]: Finished difference Result 1815 states and 5563 transitions. [2021-07-09 17:32:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:32:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:18,543 INFO L225 Difference]: With dead ends: 1815 [2021-07-09 17:32:18,543 INFO L226 Difference]: Without dead ends: 1715 [2021-07-09 17:32:18,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1070.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:32:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-07-09 17:32:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1228. [2021-07-09 17:32:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.230643846780766) internal successors, (3964), 1227 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3964 transitions. [2021-07-09 17:32:18,560 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3964 transitions. Word has length 24 [2021-07-09 17:32:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:18,560 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3964 transitions. [2021-07-09 17:32:18,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3964 transitions. [2021-07-09 17:32:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:18,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:18,562 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:18,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-07-09 17:32:18,762 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:18,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1100756016, now seen corresponding path program 244 times [2021-07-09 17:32:18,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:18,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194699940] [2021-07-09 17:32:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:18,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:18,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194699940] [2021-07-09 17:32:18,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194699940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:18,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641832548] [2021-07-09 17:32:18,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:18,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:18,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:18,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:18,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:18,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:18,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:18,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:19,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:19,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-07-09 17:32:19,235 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-07-09 17:32:19,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:19,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:19,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:32:19,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:19,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,252 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:11 [2021-07-09 17:32:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:19,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641832548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:19,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:19,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914646718] [2021-07-09 17:32:19,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:19,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:19,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:19,287 INFO L87 Difference]: Start difference. First operand 1228 states and 3964 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:20,031 INFO L93 Difference]: Finished difference Result 1641 states and 5062 transitions. [2021-07-09 17:32:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:20,034 INFO L225 Difference]: With dead ends: 1641 [2021-07-09 17:32:20,034 INFO L226 Difference]: Without dead ends: 1583 [2021-07-09 17:32:20,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 840.2ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-07-09 17:32:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1238. [2021-07-09 17:32:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.2263540824575587) internal successors, (3991), 1237 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3991 transitions. [2021-07-09 17:32:20,050 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3991 transitions. Word has length 24 [2021-07-09 17:32:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:20,050 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 3991 transitions. [2021-07-09 17:32:20,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3991 transitions. [2021-07-09 17:32:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:20,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:20,052 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:20,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1914 [2021-07-09 17:32:20,252 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash -637215800, now seen corresponding path program 245 times [2021-07-09 17:32:20,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:20,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870024262] [2021-07-09 17:32:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:20,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:20,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870024262] [2021-07-09 17:32:20,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870024262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662620312] [2021-07-09 17:32:20,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:20,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:20,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:20,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:20,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:20,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:20,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:20,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:20,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:20,562 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-07-09 17:32:20,726 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_920], 1=[v_prenex_921, o_4]} [2021-07-09 17:32:20,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:20,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:20,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:20,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:20,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:20,773 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:20,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:20,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:20,793 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:20,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:20,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:20,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-07-09 17:32:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:20,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662620312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:20,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:20,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507645815] [2021-07-09 17:32:20,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:20,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:20,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:20,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:20,875 INFO L87 Difference]: Start difference. First operand 1238 states and 3991 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:21,673 INFO L93 Difference]: Finished difference Result 1684 states and 5157 transitions. [2021-07-09 17:32:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:21,673 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:21,677 INFO L225 Difference]: With dead ends: 1684 [2021-07-09 17:32:21,677 INFO L226 Difference]: Without dead ends: 1610 [2021-07-09 17:32:21,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 880.9ms TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-07-09 17:32:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1222. [2021-07-09 17:32:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.2375102375102376) internal successors, (3953), 1221 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3953 transitions. [2021-07-09 17:32:21,693 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3953 transitions. Word has length 24 [2021-07-09 17:32:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:21,693 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 3953 transitions. [2021-07-09 17:32:21,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3953 transitions. [2021-07-09 17:32:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:21,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:21,694 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:21,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1919,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:21,895 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:21,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:21,895 INFO L82 PathProgramCache]: Analyzing trace with hash -250672622, now seen corresponding path program 246 times [2021-07-09 17:32:21,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:21,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036053319] [2021-07-09 17:32:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:22,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:22,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036053319] [2021-07-09 17:32:22,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036053319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187399886] [2021-07-09 17:32:22,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:22,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:22,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:22,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:22,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:22,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:22,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:22,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-07-09 17:32:22,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:22,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:22,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:22,463 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:22,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:22,466 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:22,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:22,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:22,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-07-09 17:32:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187399886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:22,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738489450] [2021-07-09 17:32:22,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:22,550 INFO L87 Difference]: Start difference. First operand 1222 states and 3953 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:23,807 INFO L93 Difference]: Finished difference Result 1728 states and 5336 transitions. [2021-07-09 17:32:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:23,810 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 17:32:23,810 INFO L226 Difference]: Without dead ends: 1642 [2021-07-09 17:32:23,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1104.0ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:32:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-07-09 17:32:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1235. [2021-07-09 17:32:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 3.238249594813614) internal successors, (3996), 1234 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 3996 transitions. [2021-07-09 17:32:23,827 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 3996 transitions. Word has length 24 [2021-07-09 17:32:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:23,827 INFO L482 AbstractCegarLoop]: Abstraction has 1235 states and 3996 transitions. [2021-07-09 17:32:23,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 3996 transitions. [2021-07-09 17:32:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:23,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:23,828 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:24,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1926,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:24,045 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1988644438, now seen corresponding path program 247 times [2021-07-09 17:32:24,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:24,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820077628] [2021-07-09 17:32:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:24,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820077628] [2021-07-09 17:32:24,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820077628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714032079] [2021-07-09 17:32:24,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:24,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:24,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:24,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:24,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:24,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:24,434 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-07-09 17:32:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:24,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:24,789 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:24,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:24,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:24,846 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:24,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:24,868 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:27 [2021-07-09 17:32:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:24,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714032079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:24,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:24,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596820614] [2021-07-09 17:32:24,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:24,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:24,946 INFO L87 Difference]: Start difference. First operand 1235 states and 3996 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,312 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-07-09 17:32:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:26,026 INFO L93 Difference]: Finished difference Result 1855 states and 5692 transitions. [2021-07-09 17:32:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:32:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:26,030 INFO L225 Difference]: With dead ends: 1855 [2021-07-09 17:32:26,030 INFO L226 Difference]: Without dead ends: 1789 [2021-07-09 17:32:26,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-07-09 17:32:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1236. [2021-07-09 17:32:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.239676113360324) internal successors, (4001), 1235 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4001 transitions. [2021-07-09 17:32:26,047 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4001 transitions. Word has length 24 [2021-07-09 17:32:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:26,048 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 4001 transitions. [2021-07-09 17:32:26,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4001 transitions. [2021-07-09 17:32:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:26,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:26,049 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:26,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:26,250 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1168384238, now seen corresponding path program 248 times [2021-07-09 17:32:26,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:26,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479780061] [2021-07-09 17:32:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:26,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479780061] [2021-07-09 17:32:26,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479780061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599271101] [2021-07-09 17:32:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:26,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:26,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:26,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:26,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:26,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:26,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:26,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:26,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:26,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:26,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:26,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-07-09 17:32:26,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:26,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:26,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:26,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:26,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:26,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:26,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:26,757 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:26,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:26,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:26,786 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:26,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:26,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:26,809 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:81, output treesize:25 [2021-07-09 17:32:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:26,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599271101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:26,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:26,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112866056] [2021-07-09 17:32:26,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:26,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:26,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:26,924 INFO L87 Difference]: Start difference. First operand 1236 states and 4001 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:28,303 INFO L93 Difference]: Finished difference Result 1824 states and 5589 transitions. [2021-07-09 17:32:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:32:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:28,307 INFO L225 Difference]: With dead ends: 1824 [2021-07-09 17:32:28,307 INFO L226 Difference]: Without dead ends: 1750 [2021-07-09 17:32:28,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1248.7ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:32:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-07-09 17:32:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1248. [2021-07-09 17:32:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.244587008821171) internal successors, (4046), 1247 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4046 transitions. [2021-07-09 17:32:28,324 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4046 transitions. Word has length 24 [2021-07-09 17:32:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:28,324 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 4046 transitions. [2021-07-09 17:32:28,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4046 transitions. [2021-07-09 17:32:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:28,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:28,326 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:28,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1944 [2021-07-09 17:32:28,539 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash 955680116, now seen corresponding path program 249 times [2021-07-09 17:32:28,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:28,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757473754] [2021-07-09 17:32:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:28,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:28,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757473754] [2021-07-09 17:32:28,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757473754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:28,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761308588] [2021-07-09 17:32:28,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:28,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:28,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:28,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:28,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:28,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:28,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:28,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-07-09 17:32:29,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:29,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:29,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:29,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:29,105 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:29,110 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:29,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:29,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:29,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:29,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:29,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:29,283 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:29,288 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:29,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:29,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:29,349 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:181, output treesize:69 [2021-07-09 17:32:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:29,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761308588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:29,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:29,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549919601] [2021-07-09 17:32:29,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:29,481 INFO L87 Difference]: Start difference. First operand 1248 states and 4046 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,002 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-07-09 17:32:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:30,794 INFO L93 Difference]: Finished difference Result 1851 states and 5722 transitions. [2021-07-09 17:32:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:32:30,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:30,798 INFO L225 Difference]: With dead ends: 1851 [2021-07-09 17:32:30,798 INFO L226 Difference]: Without dead ends: 1813 [2021-07-09 17:32:30,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1244.7ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:32:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-07-09 17:32:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1248. [2021-07-09 17:32:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.244587008821171) internal successors, (4046), 1247 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4046 transitions. [2021-07-09 17:32:30,815 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4046 transitions. Word has length 24 [2021-07-09 17:32:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:30,815 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 4046 transitions. [2021-07-09 17:32:30,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4046 transitions. [2021-07-09 17:32:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:30,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:30,817 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:31,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1955 [2021-07-09 17:32:31,017 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:31,018 INFO L82 PathProgramCache]: Analyzing trace with hash 696925370, now seen corresponding path program 250 times [2021-07-09 17:32:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:31,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734057942] [2021-07-09 17:32:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:31,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:31,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734057942] [2021-07-09 17:32:31,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734057942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:31,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586299782] [2021-07-09 17:32:31,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:31,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:31,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:31,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:31,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:31,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:31,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:31,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:31,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:32:31,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:31,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:31,352 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:32:31,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-07-09 17:32:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:31,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586299782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:31,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:31,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:31,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721810630] [2021-07-09 17:32:31,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:31,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:31,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:31,391 INFO L87 Difference]: Start difference. First operand 1248 states and 4046 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:31,636 INFO L93 Difference]: Finished difference Result 1525 states and 4806 transitions. [2021-07-09 17:32:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:31,639 INFO L225 Difference]: With dead ends: 1525 [2021-07-09 17:32:31,639 INFO L226 Difference]: Without dead ends: 1506 [2021-07-09 17:32:31,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-07-09 17:32:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1247. [2021-07-09 17:32:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.244783306581059) internal successors, (4043), 1246 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4043 transitions. [2021-07-09 17:32:31,654 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4043 transitions. Word has length 24 [2021-07-09 17:32:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:31,654 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4043 transitions. [2021-07-09 17:32:31,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4043 transitions. [2021-07-09 17:32:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:31,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:31,656 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:31,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1963 [2021-07-09 17:32:31,856 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -276939526, now seen corresponding path program 251 times [2021-07-09 17:32:31,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:31,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589891747] [2021-07-09 17:32:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:32,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589891747] [2021-07-09 17:32:32,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589891747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130890631] [2021-07-09 17:32:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:32,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:32,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:32,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:32,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:32,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:32,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:32,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:32,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:32:32,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:32,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:32,241 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:32:32,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-07-09 17:32:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130890631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:32,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276540316] [2021-07-09 17:32:32,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:32,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:32,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:32,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:32,280 INFO L87 Difference]: Start difference. First operand 1247 states and 4043 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:32,619 INFO L93 Difference]: Finished difference Result 1593 states and 4981 transitions. [2021-07-09 17:32:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:32,622 INFO L225 Difference]: With dead ends: 1593 [2021-07-09 17:32:32,622 INFO L226 Difference]: Without dead ends: 1519 [2021-07-09 17:32:32,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-07-09 17:32:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1214. [2021-07-09 17:32:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.233305853256389) internal successors, (3922), 1213 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3922 transitions. [2021-07-09 17:32:32,637 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3922 transitions. Word has length 24 [2021-07-09 17:32:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:32,638 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 3922 transitions. [2021-07-09 17:32:32,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3922 transitions. [2021-07-09 17:32:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:32,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:32,639 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:32,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1966 [2021-07-09 17:32:32,840 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:32,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1323711664, now seen corresponding path program 252 times [2021-07-09 17:32:32,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:32,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602341525] [2021-07-09 17:32:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:32,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602341525] [2021-07-09 17:32:32,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602341525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285809367] [2021-07-09 17:32:32,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:32,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:32,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:32,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:32:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:33,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:33,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:33,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:33,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:32:33,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:33,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:33,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,142 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-07-09 17:32:33,142 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:32:33,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-07-09 17:32:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:33,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285809367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:33,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821916402] [2021-07-09 17:32:33,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:33,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:33,180 INFO L87 Difference]: Start difference. First operand 1214 states and 3922 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:33,386 INFO L93 Difference]: Finished difference Result 1374 states and 4378 transitions. [2021-07-09 17:32:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:33,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:33,388 INFO L225 Difference]: With dead ends: 1374 [2021-07-09 17:32:33,388 INFO L226 Difference]: Without dead ends: 1315 [2021-07-09 17:32:33,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-07-09 17:32:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1228. [2021-07-09 17:32:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.230643846780766) internal successors, (3964), 1227 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3964 transitions. [2021-07-09 17:32:33,402 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3964 transitions. Word has length 24 [2021-07-09 17:32:33,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:33,402 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3964 transitions. [2021-07-09 17:32:33,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3964 transitions. [2021-07-09 17:32:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:33,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:33,404 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:33,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1969,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,604 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:33,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1058293842, now seen corresponding path program 253 times [2021-07-09 17:32:33,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:33,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209051732] [2021-07-09 17:32:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:33,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:33,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209051732] [2021-07-09 17:32:33,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209051732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771024490] [2021-07-09 17:32:33,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:33,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:33,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:33,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:33,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:33,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:33,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:32:33,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:33,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,901 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:32:33,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:33,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_941 vanished before elimination [2021-07-09 17:32:33,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:33,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:32:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:33,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771024490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:33,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:33,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982839890] [2021-07-09 17:32:33,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:33,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:33,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:33,992 INFO L87 Difference]: Start difference. First operand 1228 states and 3964 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:34,169 INFO L93 Difference]: Finished difference Result 1353 states and 4322 transitions. [2021-07-09 17:32:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:34,171 INFO L225 Difference]: With dead ends: 1353 [2021-07-09 17:32:34,171 INFO L226 Difference]: Without dead ends: 1322 [2021-07-09 17:32:34,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-07-09 17:32:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1221. [2021-07-09 17:32:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.231967213114754) internal successors, (3943), 1220 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3943 transitions. [2021-07-09 17:32:34,185 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3943 transitions. Word has length 24 [2021-07-09 17:32:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:34,185 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3943 transitions. [2021-07-09 17:32:34,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3943 transitions. [2021-07-09 17:32:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:34,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:34,187 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:34,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1973,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:34,387 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1090502694, now seen corresponding path program 254 times [2021-07-09 17:32:34,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:34,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676104661] [2021-07-09 17:32:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:34,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:34,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676104661] [2021-07-09 17:32:34,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676104661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84296947] [2021-07-09 17:32:34,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:34,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:34,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:34,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:32:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:34,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:34,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:34,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:34,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:34,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:32:34,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:34,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:34,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,774 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-07-09 17:32:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:34,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:34,798 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:32:34,798 INFO L518 ElimStorePlain]: Eliminatee v_prenex_942 vanished before elimination [2021-07-09 17:32:34,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:34,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-07-09 17:32:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:34,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84296947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:34,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:34,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308996161] [2021-07-09 17:32:34,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:34,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:34,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:34,875 INFO L87 Difference]: Start difference. First operand 1221 states and 3943 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:35,259 INFO L93 Difference]: Finished difference Result 1520 states and 4786 transitions. [2021-07-09 17:32:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:35,261 INFO L225 Difference]: With dead ends: 1520 [2021-07-09 17:32:35,261 INFO L226 Difference]: Without dead ends: 1429 [2021-07-09 17:32:35,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2021-07-09 17:32:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1221. [2021-07-09 17:32:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.231967213114754) internal successors, (3943), 1220 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3943 transitions. [2021-07-09 17:32:35,276 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3943 transitions. Word has length 24 [2021-07-09 17:32:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:35,276 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3943 transitions. [2021-07-09 17:32:35,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3943 transitions. [2021-07-09 17:32:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:35,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:35,278 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:35,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1978,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:35,478 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1383664260, now seen corresponding path program 255 times [2021-07-09 17:32:35,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:35,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842948465] [2021-07-09 17:32:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:35,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:35,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842948465] [2021-07-09 17:32:35,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842948465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:35,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401146425] [2021-07-09 17:32:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:35,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:35,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:35,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:35,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:35,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:35,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:35,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:35,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:35,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:35,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:35,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:35,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-07-09 17:32:36,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:36,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:36,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:36,084 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:36,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:36,087 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:36,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:36,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:36,112 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-07-09 17:32:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401146425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:36,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:36,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684168428] [2021-07-09 17:32:36,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:36,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:36,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:36,158 INFO L87 Difference]: Start difference. First operand 1221 states and 3943 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:36,898 INFO L93 Difference]: Finished difference Result 1468 states and 4646 transitions. [2021-07-09 17:32:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:36,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:36,901 INFO L225 Difference]: With dead ends: 1468 [2021-07-09 17:32:36,901 INFO L226 Difference]: Without dead ends: 1397 [2021-07-09 17:32:36,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 689.3ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-07-09 17:32:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1238. [2021-07-09 17:32:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.240097008892482) internal successors, (4008), 1237 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4008 transitions. [2021-07-09 17:32:36,915 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4008 transitions. Word has length 24 [2021-07-09 17:32:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:36,915 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4008 transitions. [2021-07-09 17:32:36,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4008 transitions. [2021-07-09 17:32:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:36,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:36,917 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:37,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1983,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:37,118 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1173331220, now seen corresponding path program 256 times [2021-07-09 17:32:37,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:37,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936313319] [2021-07-09 17:32:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:37,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936313319] [2021-07-09 17:32:37,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936313319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622203072] [2021-07-09 17:32:37,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:37,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:37,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:37,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:37,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:37,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:37,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:37,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:37,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:37,501 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:32:37,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:37,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:37,726 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:37,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:37,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:37,776 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:37,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:37,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:27 [2021-07-09 17:32:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:37,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622203072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:37,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:37,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:37,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959241706] [2021-07-09 17:32:37,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:37,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:37,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:37,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:37,866 INFO L87 Difference]: Start difference. First operand 1238 states and 4008 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:38,261 INFO L93 Difference]: Finished difference Result 1485 states and 4632 transitions. [2021-07-09 17:32:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:38,264 INFO L225 Difference]: With dead ends: 1485 [2021-07-09 17:32:38,264 INFO L226 Difference]: Without dead ends: 1438 [2021-07-09 17:32:38,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 508.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-07-09 17:32:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1240. [2021-07-09 17:32:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 3.2389023405972557) internal successors, (4013), 1239 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 4013 transitions. [2021-07-09 17:32:38,279 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 4013 transitions. Word has length 24 [2021-07-09 17:32:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:38,279 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 4013 transitions. [2021-07-09 17:32:38,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 4013 transitions. [2021-07-09 17:32:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:38,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:38,280 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:38,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2019 [2021-07-09 17:32:38,482 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:38,482 INFO L82 PathProgramCache]: Analyzing trace with hash -641009284, now seen corresponding path program 257 times [2021-07-09 17:32:38,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:38,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227388064] [2021-07-09 17:32:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:38,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:38,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227388064] [2021-07-09 17:32:38,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227388064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:38,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471278812] [2021-07-09 17:32:38,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:38,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:38,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:38,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:38,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:38,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:38,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:38,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:38,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:38,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:38,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:38,831 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:39,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:39,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:39,192 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:39,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:39,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:39,260 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:39,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:39,289 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-07-09 17:32:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:39,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471278812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:39,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:39,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:39,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191189622] [2021-07-09 17:32:39,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:39,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:39,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:39,344 INFO L87 Difference]: Start difference. First operand 1240 states and 4013 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:39,752 INFO L93 Difference]: Finished difference Result 1596 states and 4982 transitions. [2021-07-09 17:32:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:39,755 INFO L225 Difference]: With dead ends: 1596 [2021-07-09 17:32:39,755 INFO L226 Difference]: Without dead ends: 1538 [2021-07-09 17:32:39,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-07-09 17:32:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1239. [2021-07-09 17:32:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 3.238287560581583) internal successors, (4009), 1238 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 4009 transitions. [2021-07-09 17:32:39,771 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 4009 transitions. Word has length 24 [2021-07-09 17:32:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:39,771 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 4009 transitions. [2021-07-09 17:32:39,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 4009 transitions. [2021-07-09 17:32:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:39,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:39,773 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:39,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2027 [2021-07-09 17:32:39,977 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash -814901454, now seen corresponding path program 258 times [2021-07-09 17:32:39,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:39,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171781735] [2021-07-09 17:32:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:40,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171781735] [2021-07-09 17:32:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171781735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642102857] [2021-07-09 17:32:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:40,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:40,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:40,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:40,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:40,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:40,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:40,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-07-09 17:32:40,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:40,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:40,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:40,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:40,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:40,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:40,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:40,542 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:40,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:40,546 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:40,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:40,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:40,609 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:40,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:40,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:40,613 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:40,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:40,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:40,671 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:181, output treesize:69 [2021-07-09 17:32:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:40,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642102857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:40,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:40,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:40,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490443904] [2021-07-09 17:32:40,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:40,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:40,823 INFO L87 Difference]: Start difference. First operand 1239 states and 4009 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:41,492 INFO L93 Difference]: Finished difference Result 1727 states and 5302 transitions. [2021-07-09 17:32:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:41,495 INFO L225 Difference]: With dead ends: 1727 [2021-07-09 17:32:41,495 INFO L226 Difference]: Without dead ends: 1634 [2021-07-09 17:32:41,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 703.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-07-09 17:32:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1238. [2021-07-09 17:32:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.2376717865804365) internal successors, (4005), 1237 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4005 transitions. [2021-07-09 17:32:41,511 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4005 transitions. Word has length 24 [2021-07-09 17:32:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:41,511 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4005 transitions. [2021-07-09 17:32:41,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4005 transitions. [2021-07-09 17:32:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:41,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:41,513 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:41,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2035 [2021-07-09 17:32:41,713 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash -633221908, now seen corresponding path program 259 times [2021-07-09 17:32:41,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:41,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518013322] [2021-07-09 17:32:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:41,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518013322] [2021-07-09 17:32:41,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518013322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596158271] [2021-07-09 17:32:41,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:41,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:42,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:42,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:42,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:42,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:42,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:42,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:42,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-07-09 17:32:42,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:42,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:42,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:42,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:42,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:42,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:42,267 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:42,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:42,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:42,277 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-07-09 17:32:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:32:42,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596158271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:42,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:42,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:42,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954395091] [2021-07-09 17:32:42,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:42,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:42,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:42,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:42,314 INFO L87 Difference]: Start difference. First operand 1238 states and 4005 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:42,692 INFO L93 Difference]: Finished difference Result 1430 states and 4553 transitions. [2021-07-09 17:32:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:42,694 INFO L225 Difference]: With dead ends: 1430 [2021-07-09 17:32:42,694 INFO L226 Difference]: Without dead ends: 1411 [2021-07-09 17:32:42,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-07-09 17:32:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1236. [2021-07-09 17:32:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.2348178137651824) internal successors, (3995), 1235 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3995 transitions. [2021-07-09 17:32:42,709 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3995 transitions. Word has length 24 [2021-07-09 17:32:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:42,709 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 3995 transitions. [2021-07-09 17:32:42,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3995 transitions. [2021-07-09 17:32:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:42,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:42,711 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:42,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-07-09 17:32:42,911 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:42,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1548955540, now seen corresponding path program 260 times [2021-07-09 17:32:42,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:42,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199890457] [2021-07-09 17:32:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:43,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:43,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199890457] [2021-07-09 17:32:43,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199890457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681546919] [2021-07-09 17:32:43,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:43,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:43,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:43,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:43,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:43,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:43,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:25 [2021-07-09 17:32:43,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:43,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:43,171 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:32:43,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:13 [2021-07-09 17:32:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681546919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:43,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:43,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810528820] [2021-07-09 17:32:43,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:43,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:43,230 INFO L87 Difference]: Start difference. First operand 1236 states and 3995 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:43,486 INFO L93 Difference]: Finished difference Result 1448 states and 4602 transitions. [2021-07-09 17:32:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:43,489 INFO L225 Difference]: With dead ends: 1448 [2021-07-09 17:32:43,489 INFO L226 Difference]: Without dead ends: 1417 [2021-07-09 17:32:43,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-07-09 17:32:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1229. [2021-07-09 17:32:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 3.230456026058632) internal successors, (3967), 1228 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3967 transitions. [2021-07-09 17:32:43,504 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3967 transitions. Word has length 24 [2021-07-09 17:32:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:43,504 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 3967 transitions. [2021-07-09 17:32:43,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3967 transitions. [2021-07-09 17:32:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:43,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:43,505 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:43,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2050 [2021-07-09 17:32:43,706 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:43,706 INFO L82 PathProgramCache]: Analyzing trace with hash -311546860, now seen corresponding path program 261 times [2021-07-09 17:32:43,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:43,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58703164] [2021-07-09 17:32:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:43,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:43,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58703164] [2021-07-09 17:32:43,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58703164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699387008] [2021-07-09 17:32:43,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:43,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:43,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:43,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:43,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:43,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:44,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:44,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:44,024 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:32:44,082 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:32:44,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:44,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:44,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:44,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:44,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:44,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:44,122 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:44,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:44,125 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:44,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:44,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:44,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:31 [2021-07-09 17:32:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:44,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699387008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:44,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:44,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:44,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232801623] [2021-07-09 17:32:44,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:44,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:44,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:44,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:44,226 INFO L87 Difference]: Start difference. First operand 1229 states and 3967 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:44,607 INFO L93 Difference]: Finished difference Result 1488 states and 4691 transitions. [2021-07-09 17:32:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:44,610 INFO L225 Difference]: With dead ends: 1488 [2021-07-09 17:32:44,610 INFO L226 Difference]: Without dead ends: 1426 [2021-07-09 17:32:44,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-07-09 17:32:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1222. [2021-07-09 17:32:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.2317772317772318) internal successors, (3946), 1221 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3946 transitions. [2021-07-09 17:32:44,632 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3946 transitions. Word has length 24 [2021-07-09 17:32:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:44,632 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 3946 transitions. [2021-07-09 17:32:44,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3946 transitions. [2021-07-09 17:32:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:44,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:44,634 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:44,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:44,834 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash 319657642, now seen corresponding path program 262 times [2021-07-09 17:32:44,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:44,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440979218] [2021-07-09 17:32:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:45,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:45,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440979218] [2021-07-09 17:32:45,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440979218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:45,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177572730] [2021-07-09 17:32:45,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:45,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:45,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:32:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:45,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:45,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:45,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:45,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:45,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:45,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:45,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:32:45,370 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:32:45,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:45,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:45,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:45,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:45,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,585 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-09 17:32:45,586 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-07-09 17:32:45,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:45,591 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:45,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:45,596 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:45,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:45,601 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:45,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:45,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:32:45,673 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-07-09 17:32:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177572730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:45,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:45,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:45,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527367687] [2021-07-09 17:32:45,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:45,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:45,839 INFO L87 Difference]: Start difference. First operand 1222 states and 3946 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,115 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 17:32:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:46,661 INFO L93 Difference]: Finished difference Result 1743 states and 5461 transitions. [2021-07-09 17:32:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:46,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:46,665 INFO L225 Difference]: With dead ends: 1743 [2021-07-09 17:32:46,665 INFO L226 Difference]: Without dead ends: 1663 [2021-07-09 17:32:46,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 898.5ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-07-09 17:32:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1238. [2021-07-09 17:32:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.238480194017785) internal successors, (4006), 1237 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4006 transitions. [2021-07-09 17:32:46,682 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4006 transitions. Word has length 24 [2021-07-09 17:32:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:46,682 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4006 transitions. [2021-07-09 17:32:46,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4006 transitions. [2021-07-09 17:32:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:46,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:46,684 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:46,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2059 [2021-07-09 17:32:46,884 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2024222604, now seen corresponding path program 263 times [2021-07-09 17:32:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:46,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240377755] [2021-07-09 17:32:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:47,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:47,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240377755] [2021-07-09 17:32:47,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240377755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:47,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489886936] [2021-07-09 17:32:47,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:47,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:47,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:47,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:47,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:47,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:47,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:47,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:47,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:47,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:47,286 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:32:47,377 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:32:47,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:47,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:47,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:47,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:47,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:47,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:47,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:47,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:47,415 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,586 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-09 17:32:47,586 INFO L628 ElimStorePlain]: treesize reduction 150, result has 52.1 percent of original size [2021-07-09 17:32:47,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:47,591 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:47,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:47,596 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:47,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:47,600 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:47,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:47,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:32:47,664 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:361, output treesize:81 [2021-07-09 17:32:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:47,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489886936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:47,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:47,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:47,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944272014] [2021-07-09 17:32:47,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:47,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:47,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:47,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:47,799 INFO L87 Difference]: Start difference. First operand 1238 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,095 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 17:32:48,321 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-07-09 17:32:48,563 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2021-07-09 17:32:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:48,868 INFO L93 Difference]: Finished difference Result 1730 states and 5322 transitions. [2021-07-09 17:32:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:48,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:48,871 INFO L225 Difference]: With dead ends: 1730 [2021-07-09 17:32:48,871 INFO L226 Difference]: Without dead ends: 1653 [2021-07-09 17:32:48,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1073.4ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-07-09 17:32:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1244. [2021-07-09 17:32:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.242960579243765) internal successors, (4031), 1243 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4031 transitions. [2021-07-09 17:32:48,895 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4031 transitions. Word has length 24 [2021-07-09 17:32:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:48,895 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4031 transitions. [2021-07-09 17:32:48,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4031 transitions. [2021-07-09 17:32:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:48,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:48,897 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:49,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-07-09 17:32:49,097 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1093862012, now seen corresponding path program 264 times [2021-07-09 17:32:49,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:49,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198521810] [2021-07-09 17:32:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:49,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198521810] [2021-07-09 17:32:49,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198521810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460511336] [2021-07-09 17:32:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:49,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:49,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:49,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:49,446 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-07-09 17:32:49,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:49,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:49,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:49,552 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:49,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:49,556 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:49,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:49,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-07-09 17:32:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460511336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:49,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:49,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074781599] [2021-07-09 17:32:49,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:49,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:49,657 INFO L87 Difference]: Start difference. First operand 1244 states and 4031 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:50,464 INFO L93 Difference]: Finished difference Result 1569 states and 4977 transitions. [2021-07-09 17:32:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:50,467 INFO L225 Difference]: With dead ends: 1569 [2021-07-09 17:32:50,467 INFO L226 Difference]: Without dead ends: 1510 [2021-07-09 17:32:50,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 805.8ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-07-09 17:32:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1226. [2021-07-09 17:32:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.2310204081632654) internal successors, (3958), 1225 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3958 transitions. [2021-07-09 17:32:50,483 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3958 transitions. Word has length 24 [2021-07-09 17:32:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:50,483 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3958 transitions. [2021-07-09 17:32:50,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3958 transitions. [2021-07-09 17:32:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:50,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:50,484 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:50,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:50,685 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1660347728, now seen corresponding path program 265 times [2021-07-09 17:32:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:50,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609589417] [2021-07-09 17:32:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:50,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609589417] [2021-07-09 17:32:50,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609589417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394234442] [2021-07-09 17:32:50,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:50,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:50,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:50,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:50,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:51,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:51,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-09 17:32:51,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:51,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:51,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:51,148 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:51,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:51,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-07-09 17:32:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:51,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394234442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:51,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:51,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466599645] [2021-07-09 17:32:51,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:51,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:51,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:51,194 INFO L87 Difference]: Start difference. First operand 1226 states and 3958 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:51,418 INFO L93 Difference]: Finished difference Result 1316 states and 4183 transitions. [2021-07-09 17:32:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:51,420 INFO L225 Difference]: With dead ends: 1316 [2021-07-09 17:32:51,420 INFO L226 Difference]: Without dead ends: 1285 [2021-07-09 17:32:51,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-07-09 17:32:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1232. [2021-07-09 17:32:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.2290820471161656) internal successors, (3975), 1231 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3975 transitions. [2021-07-09 17:32:51,434 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3975 transitions. Word has length 24 [2021-07-09 17:32:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:51,434 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 3975 transitions. [2021-07-09 17:32:51,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3975 transitions. [2021-07-09 17:32:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:51,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:51,436 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:51,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2080 [2021-07-09 17:32:51,636 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 896647752, now seen corresponding path program 266 times [2021-07-09 17:32:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212699696] [2021-07-09 17:32:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:51,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:51,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212699696] [2021-07-09 17:32:51,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212699696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744812667] [2021-07-09 17:32:51,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:51,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:52,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:52,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:52,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:67 [2021-07-09 17:32:52,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:52,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:52,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:52,185 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:52,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:52,213 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:52,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:52,237 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-07-09 17:32:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:52,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744812667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:52,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090764255] [2021-07-09 17:32:52,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:52,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:52,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:52,308 INFO L87 Difference]: Start difference. First operand 1232 states and 3975 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:52,541 INFO L93 Difference]: Finished difference Result 1348 states and 4263 transitions. [2021-07-09 17:32:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:52,544 INFO L225 Difference]: With dead ends: 1348 [2021-07-09 17:32:52,544 INFO L226 Difference]: Without dead ends: 1313 [2021-07-09 17:32:52,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-07-09 17:32:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1230. [2021-07-09 17:32:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.23026851098454) internal successors, (3970), 1229 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3970 transitions. [2021-07-09 17:32:52,558 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3970 transitions. Word has length 24 [2021-07-09 17:32:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:52,559 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 3970 transitions. [2021-07-09 17:32:52,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3970 transitions. [2021-07-09 17:32:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:52,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:52,560 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:52,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,761 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash 359154896, now seen corresponding path program 267 times [2021-07-09 17:32:52,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:52,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126221912] [2021-07-09 17:32:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:52,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:52,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126221912] [2021-07-09 17:32:52,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126221912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007318783] [2021-07-09 17:32:52,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:52,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:52,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:53,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:53,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:53,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:53,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:69 [2021-07-09 17:32:53,185 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:32:53,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:53,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:53,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:53,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:53,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:53,271 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:53,276 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:53,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:53,280 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:53,284 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:53,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:53,349 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-07-09 17:32:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:53,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007318783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:53,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:53,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141252830] [2021-07-09 17:32:53,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:53,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:53,450 INFO L87 Difference]: Start difference. First operand 1230 states and 3970 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:53,912 INFO L93 Difference]: Finished difference Result 1386 states and 4396 transitions. [2021-07-09 17:32:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:53,915 INFO L225 Difference]: With dead ends: 1386 [2021-07-09 17:32:53,915 INFO L226 Difference]: Without dead ends: 1316 [2021-07-09 17:32:53,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-07-09 17:32:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1228. [2021-07-09 17:32:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.2314588427057864) internal successors, (3965), 1227 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3965 transitions. [2021-07-09 17:32:53,929 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3965 transitions. Word has length 24 [2021-07-09 17:32:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:53,929 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3965 transitions. [2021-07-09 17:32:53,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3965 transitions. [2021-07-09 17:32:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:53,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:53,930 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:54,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2095,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:54,131 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:54,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:54,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1745917266, now seen corresponding path program 268 times [2021-07-09 17:32:54,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:54,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560934315] [2021-07-09 17:32:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:54,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:54,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560934315] [2021-07-09 17:32:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560934315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677791554] [2021-07-09 17:32:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:54,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:54,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:54,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:54,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:54,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:54,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:54,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:54,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:54,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:54,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:54,785 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:54,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,794 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-07-09 17:32:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677791554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:54,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:54,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196275068] [2021-07-09 17:32:54,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:54,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:54,834 INFO L87 Difference]: Start difference. First operand 1228 states and 3965 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:55,282 INFO L93 Difference]: Finished difference Result 1366 states and 4320 transitions. [2021-07-09 17:32:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:55,284 INFO L225 Difference]: With dead ends: 1366 [2021-07-09 17:32:55,284 INFO L226 Difference]: Without dead ends: 1335 [2021-07-09 17:32:55,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 538.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-07-09 17:32:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1243. [2021-07-09 17:32:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 3.2310789049919486) internal successors, (4013), 1242 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 4013 transitions. [2021-07-09 17:32:55,298 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 4013 transitions. Word has length 24 [2021-07-09 17:32:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:55,298 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 4013 transitions. [2021-07-09 17:32:55,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 4013 transitions. [2021-07-09 17:32:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:55,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:55,300 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:55,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-07-09 17:32:55,500 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash 7945450, now seen corresponding path program 269 times [2021-07-09 17:32:55,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:55,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789354577] [2021-07-09 17:32:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:55,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789354577] [2021-07-09 17:32:55,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789354577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360123929] [2021-07-09 17:32:55,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:55,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:55,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:55,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:55,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:55,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:55,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:55,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:55,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:56,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:56,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:56,139 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:56,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:56,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:56,196 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:56,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:56,220 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-07-09 17:32:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:56,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360123929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:56,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:56,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:56,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302795518] [2021-07-09 17:32:56,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:56,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:56,291 INFO L87 Difference]: Start difference. First operand 1243 states and 4013 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:56,848 INFO L93 Difference]: Finished difference Result 1545 states and 4790 transitions. [2021-07-09 17:32:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:56,850 INFO L225 Difference]: With dead ends: 1545 [2021-07-09 17:32:56,851 INFO L226 Difference]: Without dead ends: 1483 [2021-07-09 17:32:56,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-07-09 17:32:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1241. [2021-07-09 17:32:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.232258064516129) internal successors, (4008), 1240 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4008 transitions. [2021-07-09 17:32:56,866 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4008 transitions. Word has length 24 [2021-07-09 17:32:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:56,866 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4008 transitions. [2021-07-09 17:32:56,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4008 transitions. [2021-07-09 17:32:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:56,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:56,868 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:57,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2113,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,068 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash -485808336, now seen corresponding path program 270 times [2021-07-09 17:32:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190147748] [2021-07-09 17:32:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:57,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:57,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190147748] [2021-07-09 17:32:57,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190147748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200900934] [2021-07-09 17:32:57,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:57,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:57,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:57,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:57,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:57,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:57,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:57,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:57,445 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:57,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:57,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:32:57,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:57,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-07-09 17:32:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:57,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200900934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:57,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:32:57,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495134882] [2021-07-09 17:32:57,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:57,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:57,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:57,684 INFO L87 Difference]: Start difference. First operand 1241 states and 4008 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:57,918 INFO L93 Difference]: Finished difference Result 1362 states and 4310 transitions. [2021-07-09 17:32:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:57,920 INFO L225 Difference]: With dead ends: 1362 [2021-07-09 17:32:57,920 INFO L226 Difference]: Without dead ends: 1331 [2021-07-09 17:32:57,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-07-09 17:32:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1236. [2021-07-09 17:32:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.236437246963563) internal successors, (3997), 1235 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3997 transitions. [2021-07-09 17:32:57,934 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3997 transitions. Word has length 24 [2021-07-09 17:32:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:57,935 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 3997 transitions. [2021-07-09 17:32:57,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3997 transitions. [2021-07-09 17:32:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:57,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:57,936 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:58,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2123 [2021-07-09 17:32:58,137 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1806395054, now seen corresponding path program 271 times [2021-07-09 17:32:58,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:58,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480230997] [2021-07-09 17:32:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:58,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480230997] [2021-07-09 17:32:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480230997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149342380] [2021-07-09 17:32:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:58,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:58,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:58,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:58,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:58,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:58,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:58,363 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:101 [2021-07-09 17:32:58,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:58,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:58,479 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:58,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:58,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:58,515 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:58,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:58,529 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:61, output treesize:31 [2021-07-09 17:32:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:58,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149342380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:58,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:32:58,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394429212] [2021-07-09 17:32:58,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:58,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:58,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:58,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:58,592 INFO L87 Difference]: Start difference. First operand 1236 states and 3997 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:58,899 INFO L93 Difference]: Finished difference Result 1460 states and 4580 transitions. [2021-07-09 17:32:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:58,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:32:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:58,902 INFO L225 Difference]: With dead ends: 1460 [2021-07-09 17:32:58,902 INFO L226 Difference]: Without dead ends: 1383 [2021-07-09 17:32:58,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-07-09 17:32:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1229. [2021-07-09 17:32:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 3.232084690553746) internal successors, (3969), 1228 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3969 transitions. [2021-07-09 17:32:58,916 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3969 transitions. Word has length 24 [2021-07-09 17:32:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:58,916 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 3969 transitions. [2021-07-09 17:32:58,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3969 transitions. [2021-07-09 17:32:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:32:58,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:58,918 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:59,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2130,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:59,118 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1980287224, now seen corresponding path program 272 times [2021-07-09 17:32:59,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:59,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135795197] [2021-07-09 17:32:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:32:59,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:59,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135795197] [2021-07-09 17:32:59,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135795197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:59,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682893180] [2021-07-09 17:32:59,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:59,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:59,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:32:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:59,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:59,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:59,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:59,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:59,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:59,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:32:59,495 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:32:59,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:59,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:59,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:59,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:59,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:32:59,764 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:59,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:59,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:59,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:59,897 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:59,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:59,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:32:59,961 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:00,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:00,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:00,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:00,026 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:00,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:00,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:00,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:00,090 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:00,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:00,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:00,153 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:78 [2021-07-09 17:33:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:00,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682893180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:00,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:00,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:00,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321718298] [2021-07-09 17:33:00,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:00,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:00,264 INFO L87 Difference]: Start difference. First operand 1229 states and 3969 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:00,612 INFO L93 Difference]: Finished difference Result 1451 states and 4573 transitions. [2021-07-09 17:33:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:00,614 INFO L225 Difference]: With dead ends: 1451 [2021-07-09 17:33:00,614 INFO L226 Difference]: Without dead ends: 1404 [2021-07-09 17:33:00,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-07-09 17:33:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1234. [2021-07-09 17:33:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.240064882400649) internal successors, (3995), 1233 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3995 transitions. [2021-07-09 17:33:00,630 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3995 transitions. Word has length 24 [2021-07-09 17:33:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:00,630 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3995 transitions. [2021-07-09 17:33:00,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3995 transitions. [2021-07-09 17:33:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:00,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:00,632 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:00,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2136 [2021-07-09 17:33:00,832 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1434406536, now seen corresponding path program 273 times [2021-07-09 17:33:00,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688657853] [2021-07-09 17:33:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:01,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:01,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688657853] [2021-07-09 17:33:01,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688657853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896171803] [2021-07-09 17:33:01,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:01,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:01,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:01,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:01,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:01,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-07-09 17:33:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:01,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:01,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:01,287 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:01,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:01,292 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:01,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:01,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:01,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:01,446 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:01,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:01,450 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:01,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:01,516 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:69 [2021-07-09 17:33:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:01,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896171803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:01,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:01,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9043699] [2021-07-09 17:33:01,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:01,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:01,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:01,672 INFO L87 Difference]: Start difference. First operand 1234 states and 3995 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:02,287 INFO L93 Difference]: Finished difference Result 1427 states and 4503 transitions. [2021-07-09 17:33:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:02,290 INFO L225 Difference]: With dead ends: 1427 [2021-07-09 17:33:02,290 INFO L226 Difference]: Without dead ends: 1386 [2021-07-09 17:33:02,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-07-09 17:33:02,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1228. [2021-07-09 17:33:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.2314588427057864) internal successors, (3965), 1227 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3965 transitions. [2021-07-09 17:33:02,305 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3965 transitions. Word has length 24 [2021-07-09 17:33:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:02,305 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3965 transitions. [2021-07-09 17:33:02,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3965 transitions. [2021-07-09 17:33:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:02,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:02,306 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:02,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2145 [2021-07-09 17:33:02,507 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1146515854, now seen corresponding path program 274 times [2021-07-09 17:33:02,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:02,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986753962] [2021-07-09 17:33:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:02,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986753962] [2021-07-09 17:33:02,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986753962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462328502] [2021-07-09 17:33:02,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:02,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:02,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:02,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:02,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:02,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:02,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:02,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:02,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:02,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:02,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:02,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:02,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:02,940 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:33:03,134 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:33:03,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:03,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:03,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:03,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:03,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,264 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-07-09 17:33:03,265 INFO L628 ElimStorePlain]: treesize reduction 57, result has 65.0 percent of original size [2021-07-09 17:33:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:03,270 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:03,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:03,275 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:03,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:03,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:03,323 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-07-09 17:33:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:03,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462328502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:03,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:03,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887960307] [2021-07-09 17:33:03,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:03,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:03,402 INFO L87 Difference]: Start difference. First operand 1228 states and 3965 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:03,646 INFO L93 Difference]: Finished difference Result 1317 states and 4176 transitions. [2021-07-09 17:33:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:03,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:03,649 INFO L225 Difference]: With dead ends: 1317 [2021-07-09 17:33:03,649 INFO L226 Difference]: Without dead ends: 1264 [2021-07-09 17:33:03,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-07-09 17:33:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1231. [2021-07-09 17:33:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 3.231707317073171) internal successors, (3975), 1230 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3975 transitions. [2021-07-09 17:33:03,662 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3975 transitions. Word has length 24 [2021-07-09 17:33:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:03,662 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 3975 transitions. [2021-07-09 17:33:03,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3975 transitions. [2021-07-09 17:33:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:03,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:03,664 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:03,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2155 [2021-07-09 17:33:03,864 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1180120976, now seen corresponding path program 275 times [2021-07-09 17:33:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:03,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602003266] [2021-07-09 17:33:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:04,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:04,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602003266] [2021-07-09 17:33:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602003266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:04,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132088393] [2021-07-09 17:33:04,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:04,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:33:04,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:04,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:04,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:04,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:04,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:04,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:04,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:04,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:04,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:33:04,270 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:33:04,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:04,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:04,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:04,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:04,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:04,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:04,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:04,357 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:04,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:04,377 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:04,381 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:04,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:04,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:04,386 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:04,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:04,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:04,451 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-07-09 17:33:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:04,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132088393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:04,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:04,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:04,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47634688] [2021-07-09 17:33:04,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:04,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:04,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:04,554 INFO L87 Difference]: Start difference. First operand 1231 states and 3975 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:04,896 INFO L93 Difference]: Finished difference Result 1403 states and 4431 transitions. [2021-07-09 17:33:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:04,898 INFO L225 Difference]: With dead ends: 1403 [2021-07-09 17:33:04,898 INFO L226 Difference]: Without dead ends: 1356 [2021-07-09 17:33:04,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-07-09 17:33:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1236. [2021-07-09 17:33:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.239676113360324) internal successors, (4001), 1235 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4001 transitions. [2021-07-09 17:33:04,912 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4001 transitions. Word has length 24 [2021-07-09 17:33:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:04,912 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 4001 transitions. [2021-07-09 17:33:04,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4001 transitions. [2021-07-09 17:33:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:04,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:04,914 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:05,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2168 [2021-07-09 17:33:05,114 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash 299847440, now seen corresponding path program 276 times [2021-07-09 17:33:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:05,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324280679] [2021-07-09 17:33:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:05,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:05,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324280679] [2021-07-09 17:33:05,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324280679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710551339] [2021-07-09 17:33:05,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:05,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:05,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:05,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:05,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:05,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:05,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:33:05,681 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-07-09 17:33:05,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:05,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:05,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:05,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:05,727 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:05,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,934 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-07-09 17:33:05,935 INFO L628 ElimStorePlain]: treesize reduction 173, result has 53.7 percent of original size [2021-07-09 17:33:05,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:05,940 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:05,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:05,946 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:05,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:05,950 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:06,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:06,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:33:06,035 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-07-09 17:33:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:06,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710551339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:06,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:06,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783317855] [2021-07-09 17:33:06,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:06,182 INFO L87 Difference]: Start difference. First operand 1236 states and 4001 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:06,692 INFO L93 Difference]: Finished difference Result 1598 states and 4938 transitions. [2021-07-09 17:33:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:06,695 INFO L225 Difference]: With dead ends: 1598 [2021-07-09 17:33:06,695 INFO L226 Difference]: Without dead ends: 1480 [2021-07-09 17:33:06,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-07-09 17:33:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1228. [2021-07-09 17:33:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.2314588427057864) internal successors, (3965), 1227 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3965 transitions. [2021-07-09 17:33:06,711 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3965 transitions. Word has length 24 [2021-07-09 17:33:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:06,711 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3965 transitions. [2021-07-09 17:33:06,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3965 transitions. [2021-07-09 17:33:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:06,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:06,713 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:06,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:06,913 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash -925862814, now seen corresponding path program 277 times [2021-07-09 17:33:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:06,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640034009] [2021-07-09 17:33:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:07,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:07,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640034009] [2021-07-09 17:33:07,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640034009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028143985] [2021-07-09 17:33:07,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:07,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:07,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:07,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:07,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:07,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:07,348 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:33:07,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:07,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:07,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,686 INFO L628 ElimStorePlain]: treesize reduction 49, result has 41.0 percent of original size [2021-07-09 17:33:07,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:07,690 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:07,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:07,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,702 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-07-09 17:33:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:07,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028143985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:07,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:07,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866798985] [2021-07-09 17:33:07,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:07,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:07,745 INFO L87 Difference]: Start difference. First operand 1228 states and 3965 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:08,197 INFO L93 Difference]: Finished difference Result 1395 states and 4379 transitions. [2021-07-09 17:33:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:08,200 INFO L225 Difference]: With dead ends: 1395 [2021-07-09 17:33:08,200 INFO L226 Difference]: Without dead ends: 1309 [2021-07-09 17:33:08,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 628.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-07-09 17:33:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1246. [2021-07-09 17:33:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.232128514056225) internal successors, (4024), 1245 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4024 transitions. [2021-07-09 17:33:08,214 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4024 transitions. Word has length 24 [2021-07-09 17:33:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:08,214 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4024 transitions. [2021-07-09 17:33:08,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4024 transitions. [2021-07-09 17:33:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:08,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:08,216 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:08,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-07-09 17:33:08,416 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1631132666, now seen corresponding path program 278 times [2021-07-09 17:33:08,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:08,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164447425] [2021-07-09 17:33:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:08,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:08,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164447425] [2021-07-09 17:33:08,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164447425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:08,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912296355] [2021-07-09 17:33:08,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:08,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:08,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:08,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:08,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:08,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:08,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:08,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:08,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:08,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:08,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:08,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:08,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:08,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:08,795 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:08,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:08,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:09,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:09,050 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:09,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:09,076 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:09,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:09,098 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-07-09 17:33:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:09,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912296355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:09,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:09,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:09,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053719462] [2021-07-09 17:33:09,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:09,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:09,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:09,153 INFO L87 Difference]: Start difference. First operand 1246 states and 4024 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,390 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-07-09 17:33:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:09,522 INFO L93 Difference]: Finished difference Result 1417 states and 4443 transitions. [2021-07-09 17:33:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:09,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:09,524 INFO L225 Difference]: With dead ends: 1417 [2021-07-09 17:33:09,524 INFO L226 Difference]: Without dead ends: 1370 [2021-07-09 17:33:09,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-07-09 17:33:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1240. [2021-07-09 17:33:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 3.2356739305891846) internal successors, (4009), 1239 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 4009 transitions. [2021-07-09 17:33:09,540 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 4009 transitions. Word has length 24 [2021-07-09 17:33:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:09,540 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 4009 transitions. [2021-07-09 17:33:09,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 4009 transitions. [2021-07-09 17:33:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:09,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:09,541 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:09,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2194,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:09,742 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1850428642, now seen corresponding path program 279 times [2021-07-09 17:33:09,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:09,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733942297] [2021-07-09 17:33:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:09,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733942297] [2021-07-09 17:33:09,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733942297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497423394] [2021-07-09 17:33:09,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:09,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:09,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:10,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:10,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:10,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:10,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:10,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:10,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:10,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:10,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:10,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:10,380 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:10,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:10,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:11 [2021-07-09 17:33:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:10,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497423394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:10,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:10,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:10,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112101069] [2021-07-09 17:33:10,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:10,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:10,425 INFO L87 Difference]: Start difference. First operand 1240 states and 4009 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:10,826 INFO L93 Difference]: Finished difference Result 1454 states and 4582 transitions. [2021-07-09 17:33:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:10,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:10,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:10,829 INFO L225 Difference]: With dead ends: 1454 [2021-07-09 17:33:10,829 INFO L226 Difference]: Without dead ends: 1416 [2021-07-09 17:33:10,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-07-09 17:33:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1244. [2021-07-09 17:33:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.238133547868061) internal successors, (4025), 1243 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4025 transitions. [2021-07-09 17:33:10,844 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4025 transitions. Word has length 24 [2021-07-09 17:33:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:10,844 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4025 transitions. [2021-07-09 17:33:10,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4025 transitions. [2021-07-09 17:33:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:10,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:10,845 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:11,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2202,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:11,046 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash -183207838, now seen corresponding path program 280 times [2021-07-09 17:33:11,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:11,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86350953] [2021-07-09 17:33:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:11,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:11,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86350953] [2021-07-09 17:33:11,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86350953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795299278] [2021-07-09 17:33:11,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:11,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:11,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:11,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:11,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:11,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:11,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:11,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:11,419 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:11,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:11,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:11,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:11,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:11,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:11,716 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:11,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:11,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:11,744 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:11,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:11,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:11,768 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:87, output treesize:31 [2021-07-09 17:33:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:11,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795299278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:11,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:11,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666061385] [2021-07-09 17:33:11,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:11,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:11,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:11,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:11,822 INFO L87 Difference]: Start difference. First operand 1244 states and 4025 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:12,181 INFO L93 Difference]: Finished difference Result 1475 states and 4670 transitions. [2021-07-09 17:33:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:12,183 INFO L225 Difference]: With dead ends: 1475 [2021-07-09 17:33:12,183 INFO L226 Difference]: Without dead ends: 1417 [2021-07-09 17:33:12,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-07-09 17:33:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1240. [2021-07-09 17:33:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 3.2356739305891846) internal successors, (4009), 1239 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 4009 transitions. [2021-07-09 17:33:12,198 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 4009 transitions. Word has length 24 [2021-07-09 17:33:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:12,199 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 4009 transitions. [2021-07-09 17:33:12,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 4009 transitions. [2021-07-09 17:33:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:12,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:12,200 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:12,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2209,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,401 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash -357100008, now seen corresponding path program 281 times [2021-07-09 17:33:12,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:12,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151696530] [2021-07-09 17:33:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:12,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151696530] [2021-07-09 17:33:12,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151696530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117258485] [2021-07-09 17:33:12,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:12,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:12,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:12,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:12,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:12,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:12,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:12,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:12,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:12,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:12,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:12,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:13,052 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:13,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:13,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:13,181 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:13,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:13,242 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:13,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:13,300 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:13,356 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:13,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:13,407 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:181, output treesize:69 [2021-07-09 17:33:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:13,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117258485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:13,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:13,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531587470] [2021-07-09 17:33:13,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:13,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:13,535 INFO L87 Difference]: Start difference. First operand 1240 states and 4009 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:14,206 INFO L93 Difference]: Finished difference Result 1673 states and 5210 transitions. [2021-07-09 17:33:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:14,209 INFO L225 Difference]: With dead ends: 1673 [2021-07-09 17:33:14,209 INFO L226 Difference]: Without dead ends: 1607 [2021-07-09 17:33:14,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 741.6ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-07-09 17:33:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1243. [2021-07-09 17:33:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 3.2359098228663448) internal successors, (4019), 1242 states have internal predecessors, (4019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 4019 transitions. [2021-07-09 17:33:14,226 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 4019 transitions. Word has length 24 [2021-07-09 17:33:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:14,226 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 4019 transitions. [2021-07-09 17:33:14,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 4019 transitions. [2021-07-09 17:33:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:14,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:14,228 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:14,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2217,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:14,428 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:14,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1593987042, now seen corresponding path program 282 times [2021-07-09 17:33:14,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:14,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138596515] [2021-07-09 17:33:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:14,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:14,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138596515] [2021-07-09 17:33:14,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138596515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945724688] [2021-07-09 17:33:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:14,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:14,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:14,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:14,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:14,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:14,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:14,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:14,809 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:14,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:14,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:14,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,185 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-07-09 17:33:15,186 INFO L628 ElimStorePlain]: treesize reduction 170, result has 56.1 percent of original size [2021-07-09 17:33:15,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:15,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:15,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:15,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:15,383 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:15,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:15,470 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:15,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:15,553 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:15,637 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:15,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1089 vanished before elimination [2021-07-09 17:33:15,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:33:15,714 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:401, output treesize:96 [2021-07-09 17:33:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:15,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945724688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:15,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:15,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102070496] [2021-07-09 17:33:15,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:15,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:15,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:15,864 INFO L87 Difference]: Start difference. First operand 1243 states and 4019 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:16,524 INFO L93 Difference]: Finished difference Result 1637 states and 5115 transitions. [2021-07-09 17:33:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:16,528 INFO L225 Difference]: With dead ends: 1637 [2021-07-09 17:33:16,528 INFO L226 Difference]: Without dead ends: 1564 [2021-07-09 17:33:16,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 751.0ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-07-09 17:33:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1253. [2021-07-09 17:33:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.2468051118210863) internal successors, (4065), 1252 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4065 transitions. [2021-07-09 17:33:16,551 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4065 transitions. Word has length 24 [2021-07-09 17:33:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:16,551 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4065 transitions. [2021-07-09 17:33:16,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4065 transitions. [2021-07-09 17:33:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:16,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:16,552 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:16,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-07-09 17:33:16,753 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1091154094, now seen corresponding path program 283 times [2021-07-09 17:33:16,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:16,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261771055] [2021-07-09 17:33:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:16,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:16,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261771055] [2021-07-09 17:33:16,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261771055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:16,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230679195] [2021-07-09 17:33:16,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:17,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:17,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:17,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:17,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:17,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-07-09 17:33:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:17,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:17,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:17,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:17,191 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:17,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:17,220 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:17,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:17,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:17,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:87, output treesize:31 [2021-07-09 17:33:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:17,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230679195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:17,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:17,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400290504] [2021-07-09 17:33:17,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:17,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:17,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:17,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:17,335 INFO L87 Difference]: Start difference. First operand 1253 states and 4065 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:17,692 INFO L93 Difference]: Finished difference Result 1444 states and 4587 transitions. [2021-07-09 17:33:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:17,694 INFO L225 Difference]: With dead ends: 1444 [2021-07-09 17:33:17,694 INFO L226 Difference]: Without dead ends: 1381 [2021-07-09 17:33:17,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-07-09 17:33:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1238. [2021-07-09 17:33:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.2320129345189974) internal successors, (3998), 1237 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3998 transitions. [2021-07-09 17:33:17,709 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3998 transitions. Word has length 24 [2021-07-09 17:33:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:17,709 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 3998 transitions. [2021-07-09 17:33:17,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3998 transitions. [2021-07-09 17:33:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:17,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:17,711 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:17,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-07-09 17:33:17,911 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash 146254586, now seen corresponding path program 284 times [2021-07-09 17:33:17,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:17,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183006514] [2021-07-09 17:33:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:18,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:18,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183006514] [2021-07-09 17:33:18,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183006514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643080101] [2021-07-09 17:33:18,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:18,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:18,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:18,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:18,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:18,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:18,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:18,228 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:33:18,287 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:33:18,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:18,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:18,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:18,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:18,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,373 INFO L628 ElimStorePlain]: treesize reduction 91, result has 46.2 percent of original size [2021-07-09 17:33:18,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:18,377 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:18,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:18,381 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:18,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:18,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:18,409 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-07-09 17:33:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643080101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:18,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:18,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049969236] [2021-07-09 17:33:18,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:18,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:18,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:18,476 INFO L87 Difference]: Start difference. First operand 1238 states and 3998 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:18,718 INFO L93 Difference]: Finished difference Result 1404 states and 4485 transitions. [2021-07-09 17:33:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:18,721 INFO L225 Difference]: With dead ends: 1404 [2021-07-09 17:33:18,721 INFO L226 Difference]: Without dead ends: 1344 [2021-07-09 17:33:18,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-09 17:33:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1238. [2021-07-09 17:33:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.2320129345189974) internal successors, (3998), 1237 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3998 transitions. [2021-07-09 17:33:18,735 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3998 transitions. Word has length 24 [2021-07-09 17:33:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:18,735 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 3998 transitions. [2021-07-09 17:33:18,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3998 transitions. [2021-07-09 17:33:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:18,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:18,737 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:18,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2239 [2021-07-09 17:33:18,937 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 777459088, now seen corresponding path program 285 times [2021-07-09 17:33:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:18,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700526323] [2021-07-09 17:33:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:19,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:19,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700526323] [2021-07-09 17:33:19,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700526323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:19,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636789880] [2021-07-09 17:33:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:19,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:19,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:19,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:19,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:19,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:19,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:19,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:19,375 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:33:19,490 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:33:19,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:19,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:19,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:19,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:19,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:19,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:19,567 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:19,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:19,572 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:19,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:19,577 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:19,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:19,582 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:19,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:19,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:19,632 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-07-09 17:33:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:19,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636789880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:19,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:19,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:19,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012026627] [2021-07-09 17:33:19,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:19,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:19,780 INFO L87 Difference]: Start difference. First operand 1238 states and 3998 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:20,358 INFO L93 Difference]: Finished difference Result 1642 states and 5110 transitions. [2021-07-09 17:33:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:20,361 INFO L225 Difference]: With dead ends: 1642 [2021-07-09 17:33:20,361 INFO L226 Difference]: Without dead ends: 1549 [2021-07-09 17:33:20,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 719.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-07-09 17:33:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1249. [2021-07-09 17:33:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.2411858974358974) internal successors, (4045), 1248 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4045 transitions. [2021-07-09 17:33:20,377 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4045 transitions. Word has length 24 [2021-07-09 17:33:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:20,377 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4045 transitions. [2021-07-09 17:33:20,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4045 transitions. [2021-07-09 17:33:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:20,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:20,379 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:20,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-07-09 17:33:20,579 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1551663458, now seen corresponding path program 286 times [2021-07-09 17:33:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:20,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924917237] [2021-07-09 17:33:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:20,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:20,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924917237] [2021-07-09 17:33:20,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924917237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112331398] [2021-07-09 17:33:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:20,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:20,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:20,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:20,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:20,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:21,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:21,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:21,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:21,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:21,074 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:33:21,206 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:33:21,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:21,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:21,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:21,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:21,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,299 INFO L628 ElimStorePlain]: treesize reduction 91, result has 46.2 percent of original size [2021-07-09 17:33:21,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:21,304 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:21,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:21,309 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:21,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:21,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:21,336 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-07-09 17:33:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112331398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:21,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:21,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:21,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514696522] [2021-07-09 17:33:21,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:21,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:21,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:21,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:21,414 INFO L87 Difference]: Start difference. First operand 1249 states and 4045 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:21,743 INFO L93 Difference]: Finished difference Result 1485 states and 4713 transitions. [2021-07-09 17:33:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:21,745 INFO L225 Difference]: With dead ends: 1485 [2021-07-09 17:33:21,745 INFO L226 Difference]: Without dead ends: 1413 [2021-07-09 17:33:21,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 561.1ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-07-09 17:33:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1239. [2021-07-09 17:33:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 3.232633279483037) internal successors, (4002), 1238 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 4002 transitions. [2021-07-09 17:33:21,760 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 4002 transitions. Word has length 24 [2021-07-09 17:33:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:21,761 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 4002 transitions. [2021-07-09 17:33:21,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 4002 transitions. [2021-07-09 17:33:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:21,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:21,762 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:21,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2256 [2021-07-09 17:33:21,963 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash -334922246, now seen corresponding path program 287 times [2021-07-09 17:33:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:21,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213590594] [2021-07-09 17:33:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213590594] [2021-07-09 17:33:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213590594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589623322] [2021-07-09 17:33:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:22,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:33:22,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:22,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:22,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:22,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:22,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:22,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:22,291 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-07-09 17:33:22,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:33:22,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:22,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:22,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:33:22,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:22,444 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:22,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:22,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:22,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:27 [2021-07-09 17:33:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:22,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589623322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:22,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:22,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128638653] [2021-07-09 17:33:22,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:22,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:22,541 INFO L87 Difference]: Start difference. First operand 1239 states and 4002 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:23,000 INFO L93 Difference]: Finished difference Result 1327 states and 4226 transitions. [2021-07-09 17:33:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:23,003 INFO L225 Difference]: With dead ends: 1327 [2021-07-09 17:33:23,003 INFO L226 Difference]: Without dead ends: 1288 [2021-07-09 17:33:23,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-09 17:33:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1245. [2021-07-09 17:33:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.232315112540193) internal successors, (4021), 1244 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4021 transitions. [2021-07-09 17:33:23,017 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4021 transitions. Word has length 24 [2021-07-09 17:33:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:23,017 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4021 transitions. [2021-07-09 17:33:23,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4021 transitions. [2021-07-09 17:33:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:23,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:23,023 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:23,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2264,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:23,229 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1991714584, now seen corresponding path program 288 times [2021-07-09 17:33:23,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:23,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946996728] [2021-07-09 17:33:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:23,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:23,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946996728] [2021-07-09 17:33:23,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946996728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797255917] [2021-07-09 17:33:23,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:23,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:23,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:23,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:23,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:23,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:23,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:23,577 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-07-09 17:33:23,645 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-07-09 17:33:23,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:23,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:23,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:23,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:23,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:23,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:23,740 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:23,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:23,745 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:23,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:23,749 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:23,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:23,754 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:23,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:23,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:23,815 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-07-09 17:33:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:23,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797255917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:23,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:23,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693962177] [2021-07-09 17:33:23,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:23,965 INFO L87 Difference]: Start difference. First operand 1245 states and 4021 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:24,387 INFO L93 Difference]: Finished difference Result 1410 states and 4465 transitions. [2021-07-09 17:33:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:24,390 INFO L225 Difference]: With dead ends: 1410 [2021-07-09 17:33:24,390 INFO L226 Difference]: Without dead ends: 1344 [2021-07-09 17:33:24,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-09 17:33:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1243. [2021-07-09 17:33:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 3.2334943639291467) internal successors, (4016), 1242 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 4016 transitions. [2021-07-09 17:33:24,404 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 4016 transitions. Word has length 24 [2021-07-09 17:33:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:24,405 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 4016 transitions. [2021-07-09 17:33:24,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 4016 transitions. [2021-07-09 17:33:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:24,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:24,406 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:24,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2271,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:24,607 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash -34134520, now seen corresponding path program 289 times [2021-07-09 17:33:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:24,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35861915] [2021-07-09 17:33:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:24,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:24,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35861915] [2021-07-09 17:33:24,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35861915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:24,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66703453] [2021-07-09 17:33:24,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:24,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:24,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:24,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:24,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:24,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:24,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:24,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:33:25,116 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-07-09 17:33:25,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:25,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:25,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:25,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:25,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:25,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:25,199 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:25,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:25,204 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:25,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:25,209 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:25,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:25,213 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:25,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:25,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:25,271 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-07-09 17:33:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:25,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66703453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:25,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:25,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601771393] [2021-07-09 17:33:25,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:25,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:25,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:25,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:25,418 INFO L87 Difference]: Start difference. First operand 1243 states and 4016 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:25,994 INFO L93 Difference]: Finished difference Result 1584 states and 4955 transitions. [2021-07-09 17:33:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:25,998 INFO L225 Difference]: With dead ends: 1584 [2021-07-09 17:33:25,998 INFO L226 Difference]: Without dead ends: 1491 [2021-07-09 17:33:25,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 741.2ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-07-09 17:33:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1254. [2021-07-09 17:33:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 3.2426177174780526) internal successors, (4063), 1253 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 4063 transitions. [2021-07-09 17:33:26,014 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 4063 transitions. Word has length 24 [2021-07-09 17:33:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:26,014 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 4063 transitions. [2021-07-09 17:33:26,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 4063 transitions. [2021-07-09 17:33:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:26,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:26,016 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:26,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2279 [2021-07-09 17:33:26,216 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash 740069850, now seen corresponding path program 290 times [2021-07-09 17:33:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:26,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17989083] [2021-07-09 17:33:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:26,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:26,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17989083] [2021-07-09 17:33:26,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17989083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:26,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068371755] [2021-07-09 17:33:26,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:26,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:26,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:26,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:26,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:26,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:26,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:26,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:26,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:26,658 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:33:26,796 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-07-09 17:33:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:26,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:26,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:26,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:26,851 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:26,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:26,855 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:26,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:26,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:26,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:31 [2021-07-09 17:33:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:26,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068371755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:26,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:26,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:26,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50737761] [2021-07-09 17:33:26,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:26,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:26,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:26,970 INFO L87 Difference]: Start difference. First operand 1254 states and 4063 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:27,162 INFO L93 Difference]: Finished difference Result 1424 states and 4522 transitions. [2021-07-09 17:33:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:27,165 INFO L225 Difference]: With dead ends: 1424 [2021-07-09 17:33:27,165 INFO L226 Difference]: Without dead ends: 1362 [2021-07-09 17:33:27,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-07-09 17:33:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1241. [2021-07-09 17:33:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.234677419354839) internal successors, (4011), 1240 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4011 transitions. [2021-07-09 17:33:27,180 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4011 transitions. Word has length 24 [2021-07-09 17:33:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:27,180 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4011 transitions. [2021-07-09 17:33:27,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4011 transitions. [2021-07-09 17:33:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:27,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:27,182 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:27,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2289 [2021-07-09 17:33:27,383 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1545890692, now seen corresponding path program 291 times [2021-07-09 17:33:27,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:27,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662275764] [2021-07-09 17:33:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:27,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:27,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662275764] [2021-07-09 17:33:27,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662275764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:27,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793121208] [2021-07-09 17:33:27,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:27,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:27,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:27,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:27,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:27,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:27,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:27,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:27,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:27,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:27,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:27,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:45 [2021-07-09 17:33:27,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:27,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:27,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:27,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:27,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:27,731 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:27,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:27,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:27,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:11 [2021-07-09 17:33:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:27,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793121208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:27,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:27,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:27,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39259379] [2021-07-09 17:33:27,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:27,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:27,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:27,772 INFO L87 Difference]: Start difference. First operand 1241 states and 4011 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:28,057 INFO L93 Difference]: Finished difference Result 1459 states and 4624 transitions. [2021-07-09 17:33:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:28,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:28,059 INFO L225 Difference]: With dead ends: 1459 [2021-07-09 17:33:28,059 INFO L226 Difference]: Without dead ends: 1428 [2021-07-09 17:33:28,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-07-09 17:33:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1249. [2021-07-09 17:33:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.2315705128205128) internal successors, (4033), 1248 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4033 transitions. [2021-07-09 17:33:28,074 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4033 transitions. Word has length 24 [2021-07-09 17:33:28,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:28,074 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4033 transitions. [2021-07-09 17:33:28,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4033 transitions. [2021-07-09 17:33:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:28,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:28,076 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:28,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-07-09 17:33:28,285 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1011104788, now seen corresponding path program 292 times [2021-07-09 17:33:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:28,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488518978] [2021-07-09 17:33:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:28,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488518978] [2021-07-09 17:33:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488518978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387451591] [2021-07-09 17:33:28,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:28,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:28,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:28,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:28,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:28,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-07-09 17:33:28,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:28,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:33:28,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,641 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-07-09 17:33:28,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:28,642 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:124 [2021-07-09 17:33:28,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:33:28,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:28,758 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:33:28,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:28,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:28,805 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1111 vanished before elimination [2021-07-09 17:33:28,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:28,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:28,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:28,850 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1113 vanished before elimination [2021-07-09 17:33:28,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:28,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:28,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:28,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:28,890 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1115 vanished before elimination [2021-07-09 17:33:28,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:33:28,891 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:187, output treesize:81 [2021-07-09 17:33:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:28,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387451591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:28,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:28,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:33:28,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151904043] [2021-07-09 17:33:28,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:33:28,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:33:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:33:28,970 INFO L87 Difference]: Start difference. First operand 1249 states and 4033 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:29,306 INFO L93 Difference]: Finished difference Result 1491 states and 4704 transitions. [2021-07-09 17:33:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:29,309 INFO L225 Difference]: With dead ends: 1491 [2021-07-09 17:33:29,309 INFO L226 Difference]: Without dead ends: 1456 [2021-07-09 17:33:29,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 460.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-07-09 17:33:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1247. [2021-07-09 17:33:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.232744783306581) internal successors, (4028), 1246 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4028 transitions. [2021-07-09 17:33:29,324 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4028 transitions. Word has length 24 [2021-07-09 17:33:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:29,324 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4028 transitions. [2021-07-09 17:33:29,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4028 transitions. [2021-07-09 17:33:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:29,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:29,325 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:29,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2301,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:29,526 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:29,526 INFO L82 PathProgramCache]: Analyzing trace with hash 473611932, now seen corresponding path program 293 times [2021-07-09 17:33:29,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:29,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774666913] [2021-07-09 17:33:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:29,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774666913] [2021-07-09 17:33:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774666913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997238233] [2021-07-09 17:33:29,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:29,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:33:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:29,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:29,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:29,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:29,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:29,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2021-07-09 17:33:29,913 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-07-09 17:33:29,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:29,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:29,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:29,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:29,941 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:29,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:29,945 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:29,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:29,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:29,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-07-09 17:33:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:30,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997238233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:30,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:30,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578285532] [2021-07-09 17:33:30,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:30,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:30,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:30,033 INFO L87 Difference]: Start difference. First operand 1247 states and 4028 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:30,293 INFO L93 Difference]: Finished difference Result 1455 states and 4614 transitions. [2021-07-09 17:33:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:30,295 INFO L225 Difference]: With dead ends: 1455 [2021-07-09 17:33:30,295 INFO L226 Difference]: Without dead ends: 1416 [2021-07-09 17:33:30,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-07-09 17:33:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1245. [2021-07-09 17:33:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2339228295819935) internal successors, (4023), 1244 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4023 transitions. [2021-07-09 17:33:30,310 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4023 transitions. Word has length 24 [2021-07-09 17:33:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:30,310 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4023 transitions. [2021-07-09 17:33:30,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4023 transitions. [2021-07-09 17:33:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:30,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:30,311 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:30,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2311 [2021-07-09 17:33:30,512 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1026883406, now seen corresponding path program 294 times [2021-07-09 17:33:30,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:30,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165547506] [2021-07-09 17:33:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:30,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165547506] [2021-07-09 17:33:30,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165547506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236345908] [2021-07-09 17:33:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:30,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:33:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:30,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:33:30,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:33:30,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:30,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:30,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:30,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:30,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:151 [2021-07-09 17:33:30,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:33:30,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:30,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 17:33:30,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:30,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-07-09 17:33:30,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:30,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:33:30,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:30,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-07-09 17:33:30,949 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 17:33:30,952 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:31,065 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-07-09 17:33:31,066 INFO L628 ElimStorePlain]: treesize reduction 84, result has 56.5 percent of original size [2021-07-09 17:33:31,066 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:31,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:33:31,067 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:373, output treesize:109 [2021-07-09 17:33:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:31,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236345908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:31,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:31,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221374183] [2021-07-09 17:33:31,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:31,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:31,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:31,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:31,178 INFO L87 Difference]: Start difference. First operand 1245 states and 4023 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,485 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-07-09 17:33:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:31,587 INFO L93 Difference]: Finished difference Result 1589 states and 4923 transitions. [2021-07-09 17:33:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:31,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:31,589 INFO L225 Difference]: With dead ends: 1589 [2021-07-09 17:33:31,589 INFO L226 Difference]: Without dead ends: 1497 [2021-07-09 17:33:31,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 613.1ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-07-09 17:33:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1243. [2021-07-09 17:33:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 3.2351046698872787) internal successors, (4018), 1242 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 4018 transitions. [2021-07-09 17:33:31,604 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 4018 transitions. Word has length 24 [2021-07-09 17:33:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:31,604 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 4018 transitions. [2021-07-09 17:33:31,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 4018 transitions. [2021-07-09 17:33:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:31,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:31,606 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:31,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2314,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:31,806 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1455647194, now seen corresponding path program 295 times [2021-07-09 17:33:31,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:31,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975345180] [2021-07-09 17:33:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:31,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:31,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975345180] [2021-07-09 17:33:31,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975345180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099097641] [2021-07-09 17:33:31,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:32,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:32,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:32,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:32,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:32,177 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-07-09 17:33:32,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:32,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:32,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,307 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-07-09 17:33:32,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:32,311 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:32,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:32,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-07-09 17:33:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:32,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099097641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:32,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:32,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:32,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355982115] [2021-07-09 17:33:32,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:32,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:32,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:32,359 INFO L87 Difference]: Start difference. First operand 1243 states and 4018 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:32,644 INFO L93 Difference]: Finished difference Result 1462 states and 4619 transitions. [2021-07-09 17:33:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:32,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:32,647 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:33:32,647 INFO L226 Difference]: Without dead ends: 1403 [2021-07-09 17:33:32,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-07-09 17:33:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1244. [2021-07-09 17:33:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.2357200321802093) internal successors, (4022), 1243 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4022 transitions. [2021-07-09 17:33:32,661 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4022 transitions. Word has length 24 [2021-07-09 17:33:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:32,661 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4022 transitions. [2021-07-09 17:33:32,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4022 transitions. [2021-07-09 17:33:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:32,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:32,663 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:32,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2319,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,863 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash -282324622, now seen corresponding path program 296 times [2021-07-09 17:33:32,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:32,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730933308] [2021-07-09 17:33:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:33,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:33,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730933308] [2021-07-09 17:33:33,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730933308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:33,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247630734] [2021-07-09 17:33:33,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:33,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:33,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:33,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:33,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:33,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:33,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:33,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:33,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:33,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:33,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:61 [2021-07-09 17:33:33,293 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:33:33,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:33,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:33,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:33,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:33,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:33,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:33,328 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:33,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:33,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:33,332 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:33,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:33,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:33,355 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-07-09 17:33:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:33,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247630734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:33,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:33,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:33,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746898740] [2021-07-09 17:33:33,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:33,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:33,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:33,436 INFO L87 Difference]: Start difference. First operand 1244 states and 4022 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:33,736 INFO L93 Difference]: Finished difference Result 1454 states and 4611 transitions. [2021-07-09 17:33:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:33,739 INFO L225 Difference]: With dead ends: 1454 [2021-07-09 17:33:33,739 INFO L226 Difference]: Without dead ends: 1419 [2021-07-09 17:33:33,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-07-09 17:33:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1244. [2021-07-09 17:33:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.2357200321802093) internal successors, (4022), 1243 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4022 transitions. [2021-07-09 17:33:33,754 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4022 transitions. Word has length 24 [2021-07-09 17:33:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:33,754 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4022 transitions. [2021-07-09 17:33:33,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4022 transitions. [2021-07-09 17:33:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:33,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:33,756 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:33,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2325 [2021-07-09 17:33:33,956 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash -819817478, now seen corresponding path program 297 times [2021-07-09 17:33:33,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:33,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298077953] [2021-07-09 17:33:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:34,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:34,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298077953] [2021-07-09 17:33:34,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298077953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766955305] [2021-07-09 17:33:34,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:34,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:34,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:34,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:34,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:34,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:34,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:34,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:34,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:83 [2021-07-09 17:33:34,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:33:34,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:34,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,462 INFO L628 ElimStorePlain]: treesize reduction 56, result has 65.6 percent of original size [2021-07-09 17:33:34,462 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:34,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:34,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:34,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:34,506 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:34,511 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:34,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:34,546 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:189, output treesize:47 [2021-07-09 17:33:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:34,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766955305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:34,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925731515] [2021-07-09 17:33:34,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:34,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:34,623 INFO L87 Difference]: Start difference. First operand 1244 states and 4022 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:34,867 INFO L93 Difference]: Finished difference Result 1458 states and 4609 transitions. [2021-07-09 17:33:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:34,869 INFO L225 Difference]: With dead ends: 1458 [2021-07-09 17:33:34,869 INFO L226 Difference]: Without dead ends: 1405 [2021-07-09 17:33:34,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-07-09 17:33:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1244. [2021-07-09 17:33:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.2357200321802093) internal successors, (4022), 1243 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4022 transitions. [2021-07-09 17:33:34,883 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4022 transitions. Word has length 24 [2021-07-09 17:33:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:34,883 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4022 transitions. [2021-07-09 17:33:34,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4022 transitions. [2021-07-09 17:33:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:34,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:34,885 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:35,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2332 [2021-07-09 17:33:35,085 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash 566944892, now seen corresponding path program 298 times [2021-07-09 17:33:35,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:35,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415139589] [2021-07-09 17:33:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:35,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:35,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415139589] [2021-07-09 17:33:35,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415139589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416241500] [2021-07-09 17:33:35,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:35,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:35,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:35,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:35,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:35,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:35,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:35,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:35,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:35,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:35,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:35,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:35,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:35,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:35,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:35,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:35,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:35,761 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-07-09 17:33:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:35,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:35,764 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:35,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:35,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:35,775 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-07-09 17:33:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:35,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416241500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:35,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:35,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032750324] [2021-07-09 17:33:35,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:35,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:35,815 INFO L87 Difference]: Start difference. First operand 1244 states and 4022 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:36,446 INFO L93 Difference]: Finished difference Result 1502 states and 4729 transitions. [2021-07-09 17:33:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:36,449 INFO L225 Difference]: With dead ends: 1502 [2021-07-09 17:33:36,449 INFO L226 Difference]: Without dead ends: 1443 [2021-07-09 17:33:36,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 677.0ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-07-09 17:33:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1249. [2021-07-09 17:33:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.2395833333333335) internal successors, (4043), 1248 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4043 transitions. [2021-07-09 17:33:36,463 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4043 transitions. Word has length 24 [2021-07-09 17:33:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:36,463 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4043 transitions. [2021-07-09 17:33:36,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4043 transitions. [2021-07-09 17:33:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:36,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:36,465 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:36,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:36,665 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1171026924, now seen corresponding path program 299 times [2021-07-09 17:33:36,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:36,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134500660] [2021-07-09 17:33:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:36,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:36,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134500660] [2021-07-09 17:33:36,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134500660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621591482] [2021-07-09 17:33:36,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:36,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:37,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:37,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:37,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:37,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:37,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:37,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:37,168 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:37,319 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:33:37,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:37,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:37,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:37,353 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:37,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:33:37,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:37,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:37,379 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:27 [2021-07-09 17:33:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:37,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621591482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:37,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:37,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:37,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116714121] [2021-07-09 17:33:37,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:37,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:37,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:37,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:37,435 INFO L87 Difference]: Start difference. First operand 1249 states and 4043 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:37,993 INFO L93 Difference]: Finished difference Result 1541 states and 4824 transitions. [2021-07-09 17:33:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:37,994 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:37,997 INFO L225 Difference]: With dead ends: 1541 [2021-07-09 17:33:37,997 INFO L226 Difference]: Without dead ends: 1494 [2021-07-09 17:33:37,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 670.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-07-09 17:33:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1251. [2021-07-09 17:33:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.2384) internal successors, (4048), 1250 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4048 transitions. [2021-07-09 17:33:38,012 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4048 transitions. Word has length 24 [2021-07-09 17:33:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:38,013 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4048 transitions. [2021-07-09 17:33:38,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4048 transitions. [2021-07-09 17:33:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:38,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:38,014 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:38,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-07-09 17:33:38,215 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -951730948, now seen corresponding path program 300 times [2021-07-09 17:33:38,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:38,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234819053] [2021-07-09 17:33:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:38,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234819053] [2021-07-09 17:33:38,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234819053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424013276] [2021-07-09 17:33:38,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:38,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:38,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:38,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:38,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:38,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:38,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:38,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:38,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:38,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:38,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:38,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:38,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,884 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-07-09 17:33:38,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:38,888 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:38,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:38,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,898 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-07-09 17:33:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:38,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424013276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:38,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:38,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:38,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671918110] [2021-07-09 17:33:38,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:38,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:38,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:38,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:38,938 INFO L87 Difference]: Start difference. First operand 1251 states and 4048 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:39,423 INFO L93 Difference]: Finished difference Result 1518 states and 4781 transitions. [2021-07-09 17:33:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:39,426 INFO L225 Difference]: With dead ends: 1518 [2021-07-09 17:33:39,426 INFO L226 Difference]: Without dead ends: 1463 [2021-07-09 17:33:39,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-07-09 17:33:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1252. [2021-07-09 17:33:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.2350119904076737) internal successors, (4047), 1251 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4047 transitions. [2021-07-09 17:33:39,441 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4047 transitions. Word has length 24 [2021-07-09 17:33:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:39,441 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4047 transitions. [2021-07-09 17:33:39,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4047 transitions. [2021-07-09 17:33:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:39,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:39,442 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:39,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2359,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:39,643 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1309599868, now seen corresponding path program 301 times [2021-07-09 17:33:39,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:39,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055459885] [2021-07-09 17:33:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:39,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:39,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055459885] [2021-07-09 17:33:39,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055459885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:39,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358117610] [2021-07-09 17:33:39,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:40,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:40,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:40,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:40,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:40,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:40,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:40,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:40,200 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:40,376 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:33:40,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:40,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:40,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:40,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:40,416 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:40,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:40,420 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:40,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:40,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:40,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:34 [2021-07-09 17:33:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:40,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358117610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:40,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:40,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674481185] [2021-07-09 17:33:40,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:40,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:40,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:40,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:40,520 INFO L87 Difference]: Start difference. First operand 1252 states and 4047 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:41,107 INFO L93 Difference]: Finished difference Result 1530 states and 4855 transitions. [2021-07-09 17:33:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:41,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:41,110 INFO L225 Difference]: With dead ends: 1530 [2021-07-09 17:33:41,110 INFO L226 Difference]: Without dead ends: 1484 [2021-07-09 17:33:41,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 738.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-07-09 17:33:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1245. [2021-07-09 17:33:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2363344051446945) internal successors, (4026), 1244 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4026 transitions. [2021-07-09 17:33:41,131 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4026 transitions. Word has length 24 [2021-07-09 17:33:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:41,131 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4026 transitions. [2021-07-09 17:33:41,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4026 transitions. [2021-07-09 17:33:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:41,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:41,133 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:41,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2367 [2021-07-09 17:33:41,334 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:41,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1135707698, now seen corresponding path program 302 times [2021-07-09 17:33:41,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:41,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858747298] [2021-07-09 17:33:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:41,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:41,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858747298] [2021-07-09 17:33:41,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858747298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:41,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193734228] [2021-07-09 17:33:41,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:41,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:41,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:41,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:41,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:41,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:41,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:41,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:41,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:41,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:33:41,870 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-07-09 17:33:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:41,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:41,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:41,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:41,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:41,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:41,952 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:41,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:41,957 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:41,962 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:41,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:41,967 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:42,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:42,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:42,023 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:201, output treesize:81 [2021-07-09 17:33:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193734228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:42,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:42,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:42,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619918263] [2021-07-09 17:33:42,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:42,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:42,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:42,127 INFO L87 Difference]: Start difference. First operand 1245 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:42,631 INFO L93 Difference]: Finished difference Result 1599 states and 5019 transitions. [2021-07-09 17:33:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:42,634 INFO L225 Difference]: With dead ends: 1599 [2021-07-09 17:33:42,634 INFO L226 Difference]: Without dead ends: 1552 [2021-07-09 17:33:42,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-07-09 17:33:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1250. [2021-07-09 17:33:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.244195356285028) internal successors, (4052), 1249 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4052 transitions. [2021-07-09 17:33:42,649 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4052 transitions. Word has length 24 [2021-07-09 17:33:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:42,650 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4052 transitions. [2021-07-09 17:33:42,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4052 transitions. [2021-07-09 17:33:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:42,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:42,651 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:42,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2377 [2021-07-09 17:33:42,852 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash 255434162, now seen corresponding path program 303 times [2021-07-09 17:33:42,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:42,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621955487] [2021-07-09 17:33:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:43,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:43,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621955487] [2021-07-09 17:33:43,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621955487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:43,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777697681] [2021-07-09 17:33:43,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:43,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:43,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:43,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:43,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:43,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:43,140 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-07-09 17:33:43,195 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:33:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:43,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:43,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:43,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:43,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:43,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:43,285 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:43,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:43,290 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:43,294 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:43,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:43,299 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:43,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:43,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:43,366 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:69 [2021-07-09 17:33:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:43,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777697681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:43,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:43,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:43,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098546627] [2021-07-09 17:33:43,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:43,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:43,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:43,509 INFO L87 Difference]: Start difference. First operand 1250 states and 4052 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,998 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-07-09 17:33:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:44,264 INFO L93 Difference]: Finished difference Result 1575 states and 4949 transitions. [2021-07-09 17:33:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:44,267 INFO L225 Difference]: With dead ends: 1575 [2021-07-09 17:33:44,267 INFO L226 Difference]: Without dead ends: 1534 [2021-07-09 17:33:44,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-07-09 17:33:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1245. [2021-07-09 17:33:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2363344051446945) internal successors, (4026), 1244 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4026 transitions. [2021-07-09 17:33:44,283 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4026 transitions. Word has length 24 [2021-07-09 17:33:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:44,283 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4026 transitions. [2021-07-09 17:33:44,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4026 transitions. [2021-07-09 17:33:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:44,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:44,284 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:44,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2387 [2021-07-09 17:33:44,485 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1969479068, now seen corresponding path program 304 times [2021-07-09 17:33:44,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:44,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070951399] [2021-07-09 17:33:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:44,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:44,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070951399] [2021-07-09 17:33:44,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070951399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:44,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047376942] [2021-07-09 17:33:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:44,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:44,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:44,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:44,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:44,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:44,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:44,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:33:45,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:45,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:45,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,132 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.4 percent of original size [2021-07-09 17:33:45,132 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:45,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:45,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:45,176 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:45,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:45,180 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:45,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:45,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:45,212 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:33:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:45,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047376942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:45,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075323286] [2021-07-09 17:33:45,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:45,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:45,295 INFO L87 Difference]: Start difference. First operand 1245 states and 4026 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:45,649 INFO L93 Difference]: Finished difference Result 1524 states and 4829 transitions. [2021-07-09 17:33:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:45,652 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 17:33:45,652 INFO L226 Difference]: Without dead ends: 1471 [2021-07-09 17:33:45,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-07-09 17:33:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1248. [2021-07-09 17:33:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.2365677626303127) internal successors, (4036), 1247 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4036 transitions. [2021-07-09 17:33:45,668 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4036 transitions. Word has length 24 [2021-07-09 17:33:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:45,668 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 4036 transitions. [2021-07-09 17:33:45,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4036 transitions. [2021-07-09 17:33:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:45,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:45,669 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:45,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,870 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1148602, now seen corresponding path program 305 times [2021-07-09 17:33:45,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:45,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674357671] [2021-07-09 17:33:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:46,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674357671] [2021-07-09 17:33:46,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674357671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412965815] [2021-07-09 17:33:46,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:33:46,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:46,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:46,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:46,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:46,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:46,166 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:33:46,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:46,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:46,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:46,295 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:46,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:46,299 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:46,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:46,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:46,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:46,419 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:46,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:46,423 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:46,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:46,476 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:33:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:46,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412965815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:46,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:46,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979220699] [2021-07-09 17:33:46,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:46,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:46,582 INFO L87 Difference]: Start difference. First operand 1248 states and 4036 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:46,900 INFO L93 Difference]: Finished difference Result 1550 states and 4885 transitions. [2021-07-09 17:33:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:46,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:46,902 INFO L225 Difference]: With dead ends: 1550 [2021-07-09 17:33:46,902 INFO L226 Difference]: Without dead ends: 1503 [2021-07-09 17:33:46,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-07-09 17:33:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1253. [2021-07-09 17:33:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.2444089456869007) internal successors, (4062), 1252 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4062 transitions. [2021-07-09 17:33:46,917 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4062 transitions. Word has length 24 [2021-07-09 17:33:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:46,917 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4062 transitions. [2021-07-09 17:33:46,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4062 transitions. [2021-07-09 17:33:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:46,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:46,919 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:47,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:47,119 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash -879124934, now seen corresponding path program 306 times [2021-07-09 17:33:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:47,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885775456] [2021-07-09 17:33:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:47,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:47,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885775456] [2021-07-09 17:33:47,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885775456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:47,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059366846] [2021-07-09 17:33:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:47,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:47,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:47,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:47,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:47,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:47,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:47,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:47,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:47,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:47,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:33:47,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:47,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:47,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,724 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-07-09 17:33:47,725 INFO L628 ElimStorePlain]: treesize reduction 164, result has 54.9 percent of original size [2021-07-09 17:33:47,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:33:47,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:47,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:47,807 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:47,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:47,812 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:47,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:47,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1160 vanished before elimination [2021-07-09 17:33:47,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:47,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:33:47,960 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:48,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:48,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:48,029 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:48,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:48,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1159 vanished before elimination [2021-07-09 17:33:48,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:33:48,095 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-07-09 17:33:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:33:48,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059366846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:48,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:48,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:48,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182671652] [2021-07-09 17:33:48,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:48,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:48,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:48,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:48,239 INFO L87 Difference]: Start difference. First operand 1253 states and 4062 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:48,758 INFO L93 Difference]: Finished difference Result 1745 states and 5392 transitions. [2021-07-09 17:33:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:48,761 INFO L225 Difference]: With dead ends: 1745 [2021-07-09 17:33:48,761 INFO L226 Difference]: Without dead ends: 1627 [2021-07-09 17:33:48,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-07-09 17:33:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1245. [2021-07-09 17:33:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2363344051446945) internal successors, (4026), 1244 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4026 transitions. [2021-07-09 17:33:48,777 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4026 transitions. Word has length 24 [2021-07-09 17:33:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:48,777 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4026 transitions. [2021-07-09 17:33:48,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4026 transitions. [2021-07-09 17:33:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:48,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:48,779 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:48,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2414 [2021-07-09 17:33:48,980 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:48,980 INFO L82 PathProgramCache]: Analyzing trace with hash -458036400, now seen corresponding path program 307 times [2021-07-09 17:33:48,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:48,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953062645] [2021-07-09 17:33:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:49,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953062645] [2021-07-09 17:33:49,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953062645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076427561] [2021-07-09 17:33:49,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:49,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:49,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:49,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:49,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:49,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:49,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:49,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-07-09 17:33:49,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:33:49,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:49,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:33:49,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:49,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,433 INFO L628 ElimStorePlain]: treesize reduction 8, result has 85.5 percent of original size [2021-07-09 17:33:49,434 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:49,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:49,434 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:47 [2021-07-09 17:33:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:49,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076427561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:49,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:49,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:49,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011129379] [2021-07-09 17:33:49,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:49,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:49,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:49,510 INFO L87 Difference]: Start difference. First operand 1245 states and 4026 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:49,987 INFO L93 Difference]: Finished difference Result 1718 states and 5342 transitions. [2021-07-09 17:33:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:49,989 INFO L225 Difference]: With dead ends: 1718 [2021-07-09 17:33:49,990 INFO L226 Difference]: Without dead ends: 1661 [2021-07-09 17:33:49,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-07-09 17:33:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1250. [2021-07-09 17:33:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.235388310648519) internal successors, (4041), 1249 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4041 transitions. [2021-07-09 17:33:50,006 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4041 transitions. Word has length 24 [2021-07-09 17:33:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:50,006 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4041 transitions. [2021-07-09 17:33:50,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4041 transitions. [2021-07-09 17:33:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:50,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:50,008 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:50,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:50,208 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1192496590, now seen corresponding path program 308 times [2021-07-09 17:33:50,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:50,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919485231] [2021-07-09 17:33:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:50,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:50,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919485231] [2021-07-09 17:33:50,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919485231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:50,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127205960] [2021-07-09 17:33:50,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:50,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:50,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:50,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:50,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:50,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:50,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:50,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:50,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:50,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-07-09 17:33:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:50,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:33:50,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:50,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:33:50,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:50,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:50,694 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:50,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:50,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:50,697 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:50,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:50,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:50,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:27 [2021-07-09 17:33:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:50,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127205960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:50,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:50,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:50,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198647459] [2021-07-09 17:33:50,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:50,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:50,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:50,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:50,810 INFO L87 Difference]: Start difference. First operand 1250 states and 4041 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:51,467 INFO L93 Difference]: Finished difference Result 1640 states and 5172 transitions. [2021-07-09 17:33:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:51,471 INFO L225 Difference]: With dead ends: 1640 [2021-07-09 17:33:51,471 INFO L226 Difference]: Without dead ends: 1601 [2021-07-09 17:33:51,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-07-09 17:33:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1253. [2021-07-09 17:33:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.2356230031948883) internal successors, (4051), 1252 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4051 transitions. [2021-07-09 17:33:51,488 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4051 transitions. Word has length 24 [2021-07-09 17:33:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:51,488 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4051 transitions. [2021-07-09 17:33:51,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4051 transitions. [2021-07-09 17:33:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:51,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:51,490 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:51,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2431 [2021-07-09 17:33:51,690 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:51,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1134140240, now seen corresponding path program 309 times [2021-07-09 17:33:51,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:51,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489741066] [2021-07-09 17:33:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:51,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:51,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489741066] [2021-07-09 17:33:51,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489741066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201837403] [2021-07-09 17:33:51,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:51,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:33:51,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:51,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:52,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:52,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:52,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:52,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:52,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:52,064 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-07-09 17:33:52,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:52,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:52,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,469 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-07-09 17:33:52,470 INFO L628 ElimStorePlain]: treesize reduction 163, result has 55.3 percent of original size [2021-07-09 17:33:52,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:52,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,549 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1171 vanished before elimination [2021-07-09 17:33:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:52,554 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:52,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:52,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:52,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:52,717 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:52,722 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:52,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:33:52,797 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,862 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1168 vanished before elimination [2021-07-09 17:33:52,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:33:52,864 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-07-09 17:33:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:53,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201837403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:53,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:53,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883225413] [2021-07-09 17:33:53,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:53,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:53,018 INFO L87 Difference]: Start difference. First operand 1253 states and 4051 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:53,327 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-07-09 17:33:54,097 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-07-09 17:33:54,388 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2021-07-09 17:33:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:54,398 INFO L93 Difference]: Finished difference Result 2025 states and 6224 transitions. [2021-07-09 17:33:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:54,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:54,402 INFO L225 Difference]: With dead ends: 2025 [2021-07-09 17:33:54,402 INFO L226 Difference]: Without dead ends: 1872 [2021-07-09 17:33:54,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1526.5ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-07-09 17:33:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1256. [2021-07-09 17:33:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.2358565737051794) internal successors, (4061), 1255 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4061 transitions. [2021-07-09 17:33:54,419 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4061 transitions. Word has length 24 [2021-07-09 17:33:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:54,420 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4061 transitions. [2021-07-09 17:33:54,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4061 transitions. [2021-07-09 17:33:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:54,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:54,421 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:54,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2436 [2021-07-09 17:33:54,622 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:54,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1209740006, now seen corresponding path program 310 times [2021-07-09 17:33:54,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:54,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048941886] [2021-07-09 17:33:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:54,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:54,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048941886] [2021-07-09 17:33:54,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048941886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:54,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508921521] [2021-07-09 17:33:54,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:54,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:54,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:54,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:54,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:54,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:54,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:54,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:54,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:54,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:54,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:54,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:54,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:54,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-07-09 17:33:55,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:55,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:55,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,386 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-07-09 17:33:55,386 INFO L628 ElimStorePlain]: treesize reduction 159, result has 56.4 percent of original size [2021-07-09 17:33:55,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:55,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:55,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:55,477 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:55,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:55,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:55,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:55,554 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:55,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:55,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:55,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:55,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:55,699 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:55,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:55,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:55,770 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:55,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:55,775 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:55,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:55,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:33:55,841 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-07-09 17:33:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508921521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:55,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:55,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300073036] [2021-07-09 17:33:55,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:55,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:55,991 INFO L87 Difference]: Start difference. First operand 1256 states and 4061 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:57,144 INFO L93 Difference]: Finished difference Result 2055 states and 6306 transitions. [2021-07-09 17:33:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:57,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:57,148 INFO L225 Difference]: With dead ends: 2055 [2021-07-09 17:33:57,148 INFO L226 Difference]: Without dead ends: 1906 [2021-07-09 17:33:57,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1284.3ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-07-09 17:33:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1257. [2021-07-09 17:33:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 3.2380573248407645) internal successors, (4067), 1256 states have internal predecessors, (4067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 4067 transitions. [2021-07-09 17:33:57,167 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 4067 transitions. Word has length 24 [2021-07-09 17:33:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:57,167 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 4067 transitions. [2021-07-09 17:33:57,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 4067 transitions. [2021-07-09 17:33:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:57,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:57,168 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:57,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:57,369 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash 82242856, now seen corresponding path program 311 times [2021-07-09 17:33:57,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:57,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156706833] [2021-07-09 17:33:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:57,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:57,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156706833] [2021-07-09 17:33:57,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156706833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:57,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751836299] [2021-07-09 17:33:57,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:57,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:57,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:57,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:57,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:57,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:57,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:57,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:57,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-07-09 17:33:57,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:57,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:57,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,842 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-07-09 17:33:57,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:57,845 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:57,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:57,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,856 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-07-09 17:33:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:57,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751836299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:57,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:57,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:57,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009586605] [2021-07-09 17:33:57,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:57,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:57,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:57,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:57,890 INFO L87 Difference]: Start difference. First operand 1257 states and 4067 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:58,148 INFO L93 Difference]: Finished difference Result 1358 states and 4311 transitions. [2021-07-09 17:33:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:58,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:58,150 INFO L225 Difference]: With dead ends: 1358 [2021-07-09 17:33:58,150 INFO L226 Difference]: Without dead ends: 1299 [2021-07-09 17:33:58,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:58,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-07-09 17:33:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1259. [2021-07-09 17:33:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.2384737678855324) internal successors, (4074), 1258 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4074 transitions. [2021-07-09 17:33:58,163 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4074 transitions. Word has length 24 [2021-07-09 17:33:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:58,163 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4074 transitions. [2021-07-09 17:33:58,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4074 transitions. [2021-07-09 17:33:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:58,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:58,165 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:58,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2460 [2021-07-09 17:33:58,365 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:58,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1655728960, now seen corresponding path program 312 times [2021-07-09 17:33:58,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:58,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112391877] [2021-07-09 17:33:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:58,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112391877] [2021-07-09 17:33:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112391877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303051634] [2021-07-09 17:33:58,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:58,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:33:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:58,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:58,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:58,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:58,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:58,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:61 [2021-07-09 17:33:58,793 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:33:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:58,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:58,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:58,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:58,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,906 INFO L628 ElimStorePlain]: treesize reduction 58, result has 65.7 percent of original size [2021-07-09 17:33:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:58,911 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:58,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:58,915 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:58,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:58,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:58,957 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:47 [2021-07-09 17:33:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:59,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303051634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:59,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144896546] [2021-07-09 17:33:59,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:59,037 INFO L87 Difference]: Start difference. First operand 1259 states and 4074 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:59,232 INFO L93 Difference]: Finished difference Result 1350 states and 4289 transitions. [2021-07-09 17:33:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:33:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:59,234 INFO L225 Difference]: With dead ends: 1350 [2021-07-09 17:33:59,234 INFO L226 Difference]: Without dead ends: 1301 [2021-07-09 17:33:59,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-09 17:33:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1261. [2021-07-09 17:33:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.2373015873015873) internal successors, (4079), 1260 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4079 transitions. [2021-07-09 17:33:59,247 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4079 transitions. Word has length 24 [2021-07-09 17:33:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:59,248 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4079 transitions. [2021-07-09 17:33:59,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4079 transitions. [2021-07-09 17:33:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:33:59,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:59,249 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:59,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2466 [2021-07-09 17:33:59,450 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2101745480, now seen corresponding path program 313 times [2021-07-09 17:33:59,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:59,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76338438] [2021-07-09 17:33:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:59,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:59,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76338438] [2021-07-09 17:33:59,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76338438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528237774] [2021-07-09 17:33:59,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:59,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:33:59,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:59,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:59,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:59,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:59,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2021-07-09 17:33:59,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:59,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:59,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:59,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:59,829 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:33:59,833 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:59,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:59,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:59,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-07-09 17:33:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:33:59,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528237774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944583498] [2021-07-09 17:33:59,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:59,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:59,921 INFO L87 Difference]: Start difference. First operand 1261 states and 4079 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:00,152 INFO L93 Difference]: Finished difference Result 1354 states and 4315 transitions. [2021-07-09 17:34:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:00,155 INFO L225 Difference]: With dead ends: 1354 [2021-07-09 17:34:00,155 INFO L226 Difference]: Without dead ends: 1315 [2021-07-09 17:34:00,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-07-09 17:34:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1261. [2021-07-09 17:34:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.2373015873015873) internal successors, (4079), 1260 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4079 transitions. [2021-07-09 17:34:00,168 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4079 transitions. Word has length 24 [2021-07-09 17:34:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:00,169 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4079 transitions. [2021-07-09 17:34:00,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4079 transitions. [2021-07-09 17:34:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:00,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:00,170 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:00,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-07-09 17:34:00,371 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -806459446, now seen corresponding path program 314 times [2021-07-09 17:34:00,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:00,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403033284] [2021-07-09 17:34:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:00,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:00,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403033284] [2021-07-09 17:34:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403033284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:00,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73788180] [2021-07-09 17:34:00,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:00,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:00,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:00,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:00,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:00,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:00,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:00,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:00,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:00,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:34:00,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:00,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:34:00,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:11 [2021-07-09 17:34:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:01,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73788180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:01,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:01,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870505402] [2021-07-09 17:34:01,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:01,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:01,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:01,034 INFO L87 Difference]: Start difference. First operand 1261 states and 4079 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:01,514 INFO L93 Difference]: Finished difference Result 1433 states and 4519 transitions. [2021-07-09 17:34:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:01,517 INFO L225 Difference]: With dead ends: 1433 [2021-07-09 17:34:01,517 INFO L226 Difference]: Without dead ends: 1375 [2021-07-09 17:34:01,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 549.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-07-09 17:34:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1276. [2021-07-09 17:34:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.236862745098039) internal successors, (4127), 1275 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4127 transitions. [2021-07-09 17:34:01,532 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4127 transitions. Word has length 24 [2021-07-09 17:34:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:01,532 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4127 transitions. [2021-07-09 17:34:01,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4127 transitions. [2021-07-09 17:34:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:01,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:01,534 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:01,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2479,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:01,734 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:01,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1750536034, now seen corresponding path program 315 times [2021-07-09 17:34:01,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:01,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129796800] [2021-07-09 17:34:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:01,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129796800] [2021-07-09 17:34:01,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129796800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572068462] [2021-07-09 17:34:01,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:01,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:01,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:02,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:02,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:02,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:02,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:02,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:02,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:34:02,321 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:02,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:02,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:02,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:02,356 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:02,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:02,360 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:02,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:02,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-07-09 17:34:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572068462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:02,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:02,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:02,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092159846] [2021-07-09 17:34:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:02,454 INFO L87 Difference]: Start difference. First operand 1276 states and 4127 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:02,889 INFO L93 Difference]: Finished difference Result 1571 states and 4888 transitions. [2021-07-09 17:34:02,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:02,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:02,892 INFO L225 Difference]: With dead ends: 1571 [2021-07-09 17:34:02,892 INFO L226 Difference]: Without dead ends: 1509 [2021-07-09 17:34:02,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-07-09 17:34:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1274. [2021-07-09 17:34:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.2380204241948154) internal successors, (4122), 1273 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4122 transitions. [2021-07-09 17:34:02,907 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4122 transitions. Word has length 24 [2021-07-09 17:34:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:02,907 INFO L482 AbstractCegarLoop]: Abstraction has 1274 states and 4122 transitions. [2021-07-09 17:34:02,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4122 transitions. [2021-07-09 17:34:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:02,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:02,909 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:03,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2486 [2021-07-09 17:34:03,110 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:03,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1256782248, now seen corresponding path program 316 times [2021-07-09 17:34:03,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:03,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267354715] [2021-07-09 17:34:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:03,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:03,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267354715] [2021-07-09 17:34:03,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267354715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302441059] [2021-07-09 17:34:03,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:03,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:03,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:03,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:03,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:03,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:03,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:03,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:03,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:03,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:03,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:34:03,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:03,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:03,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:03,670 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:03,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:03,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,679 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:11 [2021-07-09 17:34:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302441059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:03,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:34:03,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653426001] [2021-07-09 17:34:03,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:03,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:03,706 INFO L87 Difference]: Start difference. First operand 1274 states and 4122 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:04,000 INFO L93 Difference]: Finished difference Result 1406 states and 4455 transitions. [2021-07-09 17:34:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:04,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:04,002 INFO L225 Difference]: With dead ends: 1406 [2021-07-09 17:34:04,002 INFO L226 Difference]: Without dead ends: 1375 [2021-07-09 17:34:04,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-07-09 17:34:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1269. [2021-07-09 17:34:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2421135646687698) internal successors, (4111), 1268 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4111 transitions. [2021-07-09 17:34:04,025 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4111 transitions. Word has length 24 [2021-07-09 17:34:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:04,025 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4111 transitions. [2021-07-09 17:34:04,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4111 transitions. [2021-07-09 17:34:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:04,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:04,027 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:04,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:04,227 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:04,227 INFO L82 PathProgramCache]: Analyzing trace with hash -63804470, now seen corresponding path program 317 times [2021-07-09 17:34:04,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:04,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991953082] [2021-07-09 17:34:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:04,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:04,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991953082] [2021-07-09 17:34:04,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991953082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:04,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560604880] [2021-07-09 17:34:04,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:04,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:34:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:04,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:04,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:04,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:04,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:04,678 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:34:04,845 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:04,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:04,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:04,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:04,885 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:04,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:04,889 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:04,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:04,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:34 [2021-07-09 17:34:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:04,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560604880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:04,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:04,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:04,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698132816] [2021-07-09 17:34:04,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:04,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:04,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:04,986 INFO L87 Difference]: Start difference. First operand 1269 states and 4111 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:05,448 INFO L93 Difference]: Finished difference Result 1504 states and 4725 transitions. [2021-07-09 17:34:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:05,450 INFO L225 Difference]: With dead ends: 1504 [2021-07-09 17:34:05,451 INFO L226 Difference]: Without dead ends: 1427 [2021-07-09 17:34:05,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-09 17:34:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1262. [2021-07-09 17:34:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.237906423473434) internal successors, (4083), 1261 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4083 transitions. [2021-07-09 17:34:05,466 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4083 transitions. Word has length 24 [2021-07-09 17:34:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:05,466 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4083 transitions. [2021-07-09 17:34:05,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4083 transitions. [2021-07-09 17:34:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:05,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:05,467 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:05,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2501 [2021-07-09 17:34:05,668 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash -237696640, now seen corresponding path program 318 times [2021-07-09 17:34:05,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:05,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176217991] [2021-07-09 17:34:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:05,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:05,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176217991] [2021-07-09 17:34:05,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176217991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:05,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078382989] [2021-07-09 17:34:05,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:05,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:05,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:05,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:34:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:05,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:05,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:05,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:05,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:05,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:05,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:05,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:06,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:06,005 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-07-09 17:34:06,062 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:06,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:06,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:06,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:06,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:06,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:06,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:06,153 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:06,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:06,158 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:06,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:06,163 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:06,167 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:06,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:06,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:06,232 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:69 [2021-07-09 17:34:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:06,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078382989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:06,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:06,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935729470] [2021-07-09 17:34:06,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:06,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:06,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:06,395 INFO L87 Difference]: Start difference. First operand 1262 states and 4083 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:06,950 INFO L93 Difference]: Finished difference Result 1510 states and 4757 transitions. [2021-07-09 17:34:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:06,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:06,953 INFO L225 Difference]: With dead ends: 1510 [2021-07-09 17:34:06,953 INFO L226 Difference]: Without dead ends: 1444 [2021-07-09 17:34:06,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-07-09 17:34:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1262. [2021-07-09 17:34:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.237906423473434) internal successors, (4083), 1261 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4083 transitions. [2021-07-09 17:34:06,968 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4083 transitions. Word has length 24 [2021-07-09 17:34:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:06,968 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4083 transitions. [2021-07-09 17:34:06,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4083 transitions. [2021-07-09 17:34:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:06,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:06,970 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:07,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2509 [2021-07-09 17:34:07,170 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:07,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:07,171 INFO L82 PathProgramCache]: Analyzing trace with hash 596074730, now seen corresponding path program 319 times [2021-07-09 17:34:07,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:07,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168201604] [2021-07-09 17:34:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:07,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:07,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168201604] [2021-07-09 17:34:07,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168201604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:07,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560520884] [2021-07-09 17:34:07,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:07,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:07,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:07,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:07,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:07,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:07,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:07,544 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:34:07,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:07,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:07,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,808 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.1 percent of original size [2021-07-09 17:34:07,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:07,813 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:07,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:07,817 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:07,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:07,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:34:07,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:07,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1203 vanished before elimination [2021-07-09 17:34:07,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:07,885 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:34:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560520884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:07,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:07,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:07,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959224353] [2021-07-09 17:34:07,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:07,981 INFO L87 Difference]: Start difference. First operand 1262 states and 4083 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:08,467 INFO L93 Difference]: Finished difference Result 1416 states and 4513 transitions. [2021-07-09 17:34:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:08,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:08,470 INFO L225 Difference]: With dead ends: 1416 [2021-07-09 17:34:08,470 INFO L226 Difference]: Without dead ends: 1363 [2021-07-09 17:34:08,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-07-09 17:34:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1265. [2021-07-09 17:34:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.238132911392405) internal successors, (4093), 1264 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4093 transitions. [2021-07-09 17:34:08,484 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4093 transitions. Word has length 24 [2021-07-09 17:34:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:08,484 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4093 transitions. [2021-07-09 17:34:08,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4093 transitions. [2021-07-09 17:34:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:08,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:08,486 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:08,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2519,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:08,686 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:08,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1372255736, now seen corresponding path program 320 times [2021-07-09 17:34:08,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:08,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278537386] [2021-07-09 17:34:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:08,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:08,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278537386] [2021-07-09 17:34:08,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278537386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:08,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031087303] [2021-07-09 17:34:08,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:08,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:08,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:08,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:09,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:09,030 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:34:09,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:09,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:09,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:09,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:09,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:09,218 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:09,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:09,222 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:09,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:09,275 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:09,279 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:09,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:09,328 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:34:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:09,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031087303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:09,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:09,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:09,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911296643] [2021-07-09 17:34:09,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:09,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:09,450 INFO L87 Difference]: Start difference. First operand 1265 states and 4093 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:10,074 INFO L93 Difference]: Finished difference Result 1514 states and 4725 transitions. [2021-07-09 17:34:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:10,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:10,077 INFO L225 Difference]: With dead ends: 1514 [2021-07-09 17:34:10,077 INFO L226 Difference]: Without dead ends: 1452 [2021-07-09 17:34:10,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-07-09 17:34:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1268. [2021-07-09 17:34:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 3.2383583267561167) internal successors, (4103), 1267 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4103 transitions. [2021-07-09 17:34:10,093 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4103 transitions. Word has length 24 [2021-07-09 17:34:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:10,093 INFO L482 AbstractCegarLoop]: Abstraction has 1268 states and 4103 transitions. [2021-07-09 17:34:10,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4103 transitions. [2021-07-09 17:34:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:10,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:10,095 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:10,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:10,295 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash 437129930, now seen corresponding path program 321 times [2021-07-09 17:34:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:10,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165913366] [2021-07-09 17:34:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:10,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:10,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165913366] [2021-07-09 17:34:10,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165913366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:10,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575873008] [2021-07-09 17:34:10,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:10,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:10,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:10,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:10,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:10,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:10,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:10,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:34:10,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:10,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:10,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:10,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:10,692 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:10,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:10,696 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:10,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:10,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:10,755 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:10,759 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:10,814 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:10,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:10,818 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:10,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:10,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:10,867 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:34:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:10,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575873008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:10,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:10,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:10,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093785147] [2021-07-09 17:34:10,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:10,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:10,998 INFO L87 Difference]: Start difference. First operand 1268 states and 4103 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:11,541 INFO L93 Difference]: Finished difference Result 1420 states and 4505 transitions. [2021-07-09 17:34:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:11,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:11,543 INFO L225 Difference]: With dead ends: 1420 [2021-07-09 17:34:11,544 INFO L226 Difference]: Without dead ends: 1363 [2021-07-09 17:34:11,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-07-09 17:34:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1263. [2021-07-09 17:34:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 3.2393026941362915) internal successors, (4088), 1262 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4088 transitions. [2021-07-09 17:34:11,558 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4088 transitions. Word has length 24 [2021-07-09 17:34:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:11,558 INFO L482 AbstractCegarLoop]: Abstraction has 1263 states and 4088 transitions. [2021-07-09 17:34:11,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4088 transitions. [2021-07-09 17:34:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:11,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:11,560 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2537 [2021-07-09 17:34:11,760 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash 816727770, now seen corresponding path program 322 times [2021-07-09 17:34:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:11,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518848902] [2021-07-09 17:34:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:11,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:11,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518848902] [2021-07-09 17:34:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518848902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:11,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279540275] [2021-07-09 17:34:11,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:11,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:11,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:11,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:11,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:12,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:12,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:12,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:12,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:12,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:12,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:12,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:34:12,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:12,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:12,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,301 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-07-09 17:34:12,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:12,306 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:12,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:12,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,316 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-07-09 17:34:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:12,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279540275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:12,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:12,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:12,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621627758] [2021-07-09 17:34:12,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:12,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:12,356 INFO L87 Difference]: Start difference. First operand 1263 states and 4088 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:12,851 INFO L93 Difference]: Finished difference Result 1433 states and 4511 transitions. [2021-07-09 17:34:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:12,854 INFO L225 Difference]: With dead ends: 1433 [2021-07-09 17:34:12,854 INFO L226 Difference]: Without dead ends: 1347 [2021-07-09 17:34:12,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-07-09 17:34:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1281. [2021-07-09 17:34:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.23984375) internal successors, (4147), 1280 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4147 transitions. [2021-07-09 17:34:12,869 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4147 transitions. Word has length 24 [2021-07-09 17:34:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:12,869 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4147 transitions. [2021-07-09 17:34:12,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4147 transitions. [2021-07-09 17:34:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:12,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:12,870 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:13,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2547,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,071 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:13,071 INFO L82 PathProgramCache]: Analyzing trace with hash -921244046, now seen corresponding path program 323 times [2021-07-09 17:34:13,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:13,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555197884] [2021-07-09 17:34:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:13,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:13,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555197884] [2021-07-09 17:34:13,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555197884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926669638] [2021-07-09 17:34:13,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:13,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:13,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:13,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:13,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:13,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:13,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:13,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:13,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:13,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:13,394 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:34:13,555 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:13,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:13,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:13,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:13,591 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:13,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:34:13,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:13,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:13,617 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-07-09 17:34:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926669638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:13,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:34:13,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883658997] [2021-07-09 17:34:13,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:13,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:13,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:13,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:13,669 INFO L87 Difference]: Start difference. First operand 1281 states and 4147 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:14,004 INFO L93 Difference]: Finished difference Result 1455 states and 4575 transitions. [2021-07-09 17:34:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:14,006 INFO L225 Difference]: With dead ends: 1455 [2021-07-09 17:34:14,006 INFO L226 Difference]: Without dead ends: 1408 [2021-07-09 17:34:14,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-07-09 17:34:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1275. [2021-07-09 17:34:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.2433281004709578) internal successors, (4132), 1274 states have internal predecessors, (4132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4132 transitions. [2021-07-09 17:34:14,022 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4132 transitions. Word has length 24 [2021-07-09 17:34:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:14,022 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4132 transitions. [2021-07-09 17:34:14,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4132 transitions. [2021-07-09 17:34:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:14,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:14,024 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:14,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-07-09 17:34:14,224 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -701948070, now seen corresponding path program 324 times [2021-07-09 17:34:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632876020] [2021-07-09 17:34:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:14,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:14,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632876020] [2021-07-09 17:34:14,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632876020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:14,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496627707] [2021-07-09 17:34:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:14,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:14,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:14,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:14,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:14,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:14,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:14,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:14,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:14,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:34:14,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:14,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:14,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:14,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:14,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:14,660 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:14,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:14,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:14,664 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:14,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:14,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:14,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:34:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496627707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:14,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:14,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:14,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462437643] [2021-07-09 17:34:14,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:14,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:14,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:14,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:14,739 INFO L87 Difference]: Start difference. First operand 1275 states and 4132 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:15,196 INFO L93 Difference]: Finished difference Result 1453 states and 4602 transitions. [2021-07-09 17:34:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:15,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:15,199 INFO L225 Difference]: With dead ends: 1453 [2021-07-09 17:34:15,199 INFO L226 Difference]: Without dead ends: 1370 [2021-07-09 17:34:15,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-07-09 17:34:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1282. [2021-07-09 17:34:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.24199843871975) internal successors, (4153), 1281 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4153 transitions. [2021-07-09 17:34:15,213 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4153 transitions. Word has length 24 [2021-07-09 17:34:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:15,213 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4153 transitions. [2021-07-09 17:34:15,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4153 transitions. [2021-07-09 17:34:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:15,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:15,215 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:15,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:15,415 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1559382746, now seen corresponding path program 325 times [2021-07-09 17:34:15,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:15,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200666952] [2021-07-09 17:34:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:15,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200666952] [2021-07-09 17:34:15,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200666952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728004996] [2021-07-09 17:34:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:15,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:15,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:15,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:15,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:15,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:15,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:15,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:15,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:34:15,998 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:16,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:16,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:16,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:16,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:16,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:16,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:16,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:16,038 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:16,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:16,042 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:16,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:16,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:16,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-07-09 17:34:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:16,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728004996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:16,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:16,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:16,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765756739] [2021-07-09 17:34:16,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:16,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:16,138 INFO L87 Difference]: Start difference. First operand 1282 states and 4153 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:16,454 INFO L93 Difference]: Finished difference Result 1485 states and 4719 transitions. [2021-07-09 17:34:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:16,456 INFO L225 Difference]: With dead ends: 1485 [2021-07-09 17:34:16,456 INFO L226 Difference]: Without dead ends: 1427 [2021-07-09 17:34:16,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:16,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-09 17:34:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1275. [2021-07-09 17:34:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.2433281004709578) internal successors, (4132), 1274 states have internal predecessors, (4132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4132 transitions. [2021-07-09 17:34:16,472 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4132 transitions. Word has length 24 [2021-07-09 17:34:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:16,472 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4132 transitions. [2021-07-09 17:34:16,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4132 transitions. [2021-07-09 17:34:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:16,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:16,474 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:16,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2569 [2021-07-09 17:34:16,674 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1385490576, now seen corresponding path program 326 times [2021-07-09 17:34:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:16,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603903592] [2021-07-09 17:34:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:16,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:16,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603903592] [2021-07-09 17:34:16,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603903592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:16,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137248102] [2021-07-09 17:34:16,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:16,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:16,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:16,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:16,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:16,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:16,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:16,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:16,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:16,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:16,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:16,894 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-07-09 17:34:16,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:16,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:16,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:16,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:16,989 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:17,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:17,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:17,069 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:17,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:17,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:17,144 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:17,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:17,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:17,215 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:17,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:17,246 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:129, output treesize:69 [2021-07-09 17:34:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:17,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137248102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:17,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:17,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104736935] [2021-07-09 17:34:17,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:17,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:17,355 INFO L87 Difference]: Start difference. First operand 1275 states and 4132 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:17,710 INFO L93 Difference]: Finished difference Result 1593 states and 4963 transitions. [2021-07-09 17:34:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:17,713 INFO L225 Difference]: With dead ends: 1593 [2021-07-09 17:34:17,713 INFO L226 Difference]: Without dead ends: 1519 [2021-07-09 17:34:17,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-07-09 17:34:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1280. [2021-07-09 17:34:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2509773260359656) internal successors, (4158), 1279 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4158 transitions. [2021-07-09 17:34:17,729 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4158 transitions. Word has length 24 [2021-07-09 17:34:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:17,729 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4158 transitions. [2021-07-09 17:34:17,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4158 transitions. [2021-07-09 17:34:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:17,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:17,731 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:17,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2576 [2021-07-09 17:34:17,931 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:17,931 INFO L82 PathProgramCache]: Analyzing trace with hash 505217040, now seen corresponding path program 327 times [2021-07-09 17:34:17,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:17,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255944421] [2021-07-09 17:34:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:18,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:18,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255944421] [2021-07-09 17:34:18,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255944421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:18,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282517887] [2021-07-09 17:34:18,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:18,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:18,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:18,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:18,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:18,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:18,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:34:18,365 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:18,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:18,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:18,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:18,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:18,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:18,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:18,462 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:18,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:18,466 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:18,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:18,471 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:18,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:18,475 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:18,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:18,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:18,535 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-07-09 17:34:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282517887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:18,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:18,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:18,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012724762] [2021-07-09 17:34:18,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:18,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:18,672 INFO L87 Difference]: Start difference. First operand 1280 states and 4158 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:19,128 INFO L93 Difference]: Finished difference Result 1637 states and 5102 transitions. [2021-07-09 17:34:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:19,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:19,131 INFO L225 Difference]: With dead ends: 1637 [2021-07-09 17:34:19,131 INFO L226 Difference]: Without dead ends: 1580 [2021-07-09 17:34:19,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-07-09 17:34:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1280. [2021-07-09 17:34:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.251759186864738) internal successors, (4159), 1279 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4159 transitions. [2021-07-09 17:34:19,148 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4159 transitions. Word has length 24 [2021-07-09 17:34:19,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:19,148 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4159 transitions. [2021-07-09 17:34:19,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:19,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4159 transitions. [2021-07-09 17:34:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:19,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:19,150 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:19,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2582,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:19,350 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:19,351 INFO L82 PathProgramCache]: Analyzing trace with hash 441641288, now seen corresponding path program 328 times [2021-07-09 17:34:19,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:19,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205796997] [2021-07-09 17:34:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:19,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205796997] [2021-07-09 17:34:19,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205796997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040010861] [2021-07-09 17:34:19,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:19,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:19,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:19,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:19,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:19,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:19,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-07-09 17:34:19,703 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:19,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:19,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:19,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:19,755 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:19,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:19,759 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:19,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:19,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:19,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-07-09 17:34:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:19,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040010861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:19,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:19,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:19,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162983090] [2021-07-09 17:34:19,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:19,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:19,873 INFO L87 Difference]: Start difference. First operand 1280 states and 4159 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:20,076 INFO L93 Difference]: Finished difference Result 1462 states and 4643 transitions. [2021-07-09 17:34:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:20,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:20,078 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:34:20,078 INFO L226 Difference]: Without dead ends: 1424 [2021-07-09 17:34:20,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-07-09 17:34:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1272. [2021-07-09 17:34:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.238394964594807) internal successors, (4116), 1271 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4116 transitions. [2021-07-09 17:34:20,094 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4116 transitions. Word has length 24 [2021-07-09 17:34:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:20,094 INFO L482 AbstractCegarLoop]: Abstraction has 1272 states and 4116 transitions. [2021-07-09 17:34:20,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4116 transitions. [2021-07-09 17:34:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:20,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:20,095 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:20,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2591,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:20,296 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1888845170, now seen corresponding path program 329 times [2021-07-09 17:34:20,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:20,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249415346] [2021-07-09 17:34:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:20,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:20,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249415346] [2021-07-09 17:34:20,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249415346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:20,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685853796] [2021-07-09 17:34:20,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:20,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:20,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:20,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:20,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:20,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:20,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-07-09 17:34:20,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:20,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:20,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:20,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:20,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:20,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:20,618 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:20,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:20,623 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:20,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:20,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:20,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-07-09 17:34:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:20,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685853796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:20,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:20,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:20,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242707151] [2021-07-09 17:34:20,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:20,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:20,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:20,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:20,717 INFO L87 Difference]: Start difference. First operand 1272 states and 4116 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:21,035 INFO L93 Difference]: Finished difference Result 1441 states and 4626 transitions. [2021-07-09 17:34:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:21,038 INFO L225 Difference]: With dead ends: 1441 [2021-07-09 17:34:21,038 INFO L226 Difference]: Without dead ends: 1395 [2021-07-09 17:34:21,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-07-09 17:34:21,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1265. [2021-07-09 17:34:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2397151898734178) internal successors, (4095), 1264 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4095 transitions. [2021-07-09 17:34:21,053 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4095 transitions. Word has length 24 [2021-07-09 17:34:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:21,054 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4095 transitions. [2021-07-09 17:34:21,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4095 transitions. [2021-07-09 17:34:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:21,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:21,055 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:21,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2598 [2021-07-09 17:34:21,256 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:21,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1774917624, now seen corresponding path program 330 times [2021-07-09 17:34:21,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:21,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621792231] [2021-07-09 17:34:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:21,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621792231] [2021-07-09 17:34:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621792231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:21,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292548252] [2021-07-09 17:34:21,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:21,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:21,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:21,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:21,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:21,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:21,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:21,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:21,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:21,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:21,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:34:21,743 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-07-09 17:34:21,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:21,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:21,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:21,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:21,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:21,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:21,835 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:21,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:21,840 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:21,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:21,845 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:21,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:21,849 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:21,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:21,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:21,906 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:193, output treesize:69 [2021-07-09 17:34:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:22,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292548252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:22,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:22,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:22,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333960198] [2021-07-09 17:34:22,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:22,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:22,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:22,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:22,062 INFO L87 Difference]: Start difference. First operand 1265 states and 4095 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:22,742 INFO L93 Difference]: Finished difference Result 1705 states and 5315 transitions. [2021-07-09 17:34:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:22,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:22,745 INFO L225 Difference]: With dead ends: 1705 [2021-07-09 17:34:22,745 INFO L226 Difference]: Without dead ends: 1612 [2021-07-09 17:34:22,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 817.6ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-07-09 17:34:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1276. [2021-07-09 17:34:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.248627450980392) internal successors, (4142), 1275 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4142 transitions. [2021-07-09 17:34:22,762 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4142 transitions. Word has length 24 [2021-07-09 17:34:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:22,762 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4142 transitions. [2021-07-09 17:34:22,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4142 transitions. [2021-07-09 17:34:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:22,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:22,763 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:22,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2601 [2021-07-09 17:34:22,964 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1000713254, now seen corresponding path program 331 times [2021-07-09 17:34:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:22,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390513227] [2021-07-09 17:34:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:23,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:23,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390513227] [2021-07-09 17:34:23,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390513227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:23,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147045233] [2021-07-09 17:34:23,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:23,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:23,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:23,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:23,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:23,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:23,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:23,296 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:34:23,433 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-07-09 17:34:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:23,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:23,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:23,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:23,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:23,530 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-07-09 17:34:23,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:23,535 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:23,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:23,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:23,539 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:23,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:23,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:23,570 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:205, output treesize:34 [2021-07-09 17:34:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:23,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147045233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:23,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:23,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:23,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096159665] [2021-07-09 17:34:23,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:23,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:23,650 INFO L87 Difference]: Start difference. First operand 1276 states and 4142 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:24,258 INFO L93 Difference]: Finished difference Result 1725 states and 5356 transitions. [2021-07-09 17:34:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:24,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:24,261 INFO L225 Difference]: With dead ends: 1725 [2021-07-09 17:34:24,261 INFO L226 Difference]: Without dead ends: 1591 [2021-07-09 17:34:24,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-07-09 17:34:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1265. [2021-07-09 17:34:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2397151898734178) internal successors, (4095), 1264 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4095 transitions. [2021-07-09 17:34:24,278 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4095 transitions. Word has length 24 [2021-07-09 17:34:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:24,278 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4095 transitions. [2021-07-09 17:34:24,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4095 transitions. [2021-07-09 17:34:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:24,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:24,279 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:24,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2611 [2021-07-09 17:34:24,480 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:24,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1407668338, now seen corresponding path program 332 times [2021-07-09 17:34:24,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:24,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775300551] [2021-07-09 17:34:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:24,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:24,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775300551] [2021-07-09 17:34:24,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775300551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:24,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208907961] [2021-07-09 17:34:24,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:24,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:24,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:24,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:24,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:24,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:24,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:24,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:24,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:24,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:34:24,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:24,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:24,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:24,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:24,990 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:24,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:24,994 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:25,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:25,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:25,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:25,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:25,094 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:25,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:25,098 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:25,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:25,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:25,138 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-07-09 17:34:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:25,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208907961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:25,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:25,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:25,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103599457] [2021-07-09 17:34:25,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:25,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:25,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:25,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:25,238 INFO L87 Difference]: Start difference. First operand 1265 states and 4095 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:25,698 INFO L93 Difference]: Finished difference Result 1434 states and 4560 transitions. [2021-07-09 17:34:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:25,700 INFO L225 Difference]: With dead ends: 1434 [2021-07-09 17:34:25,700 INFO L226 Difference]: Without dead ends: 1364 [2021-07-09 17:34:25,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-07-09 17:34:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1271. [2021-07-09 17:34:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 3.2393700787401576) internal successors, (4114), 1270 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 4114 transitions. [2021-07-09 17:34:25,715 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 4114 transitions. Word has length 24 [2021-07-09 17:34:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:25,715 INFO L482 AbstractCegarLoop]: Abstraction has 1271 states and 4114 transitions. [2021-07-09 17:34:25,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 4114 transitions. [2021-07-09 17:34:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:25,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:25,716 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:25,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2618 [2021-07-09 17:34:25,917 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:25,917 INFO L82 PathProgramCache]: Analyzing trace with hash -560662128, now seen corresponding path program 333 times [2021-07-09 17:34:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:25,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317583805] [2021-07-09 17:34:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:26,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:26,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317583805] [2021-07-09 17:34:26,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317583805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:26,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522866048] [2021-07-09 17:34:26,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:26,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:26,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:26,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:26,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:26,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:26,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:26,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:34:26,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:26,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:26,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:26,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:26,401 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:26,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:26,406 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:26,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:26,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:26,465 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:26,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:26,523 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:26,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:26,527 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:26,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:26,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:26,576 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:34:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:26,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522866048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:26,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:26,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:26,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061054643] [2021-07-09 17:34:26,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:26,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:26,729 INFO L87 Difference]: Start difference. First operand 1271 states and 4114 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:27,159 INFO L93 Difference]: Finished difference Result 1446 states and 4588 transitions. [2021-07-09 17:34:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:27,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:27,162 INFO L225 Difference]: With dead ends: 1446 [2021-07-09 17:34:27,162 INFO L226 Difference]: Without dead ends: 1380 [2021-07-09 17:34:27,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-07-09 17:34:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1268. [2021-07-09 17:34:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 3.2391475927387527) internal successors, (4104), 1267 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4104 transitions. [2021-07-09 17:34:27,177 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4104 transitions. Word has length 24 [2021-07-09 17:34:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:27,178 INFO L482 AbstractCegarLoop]: Abstraction has 1268 states and 4104 transitions. [2021-07-09 17:34:27,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4104 transitions. [2021-07-09 17:34:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:27,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:27,179 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:27,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2628,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:27,380 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:27,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:27,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1708456064, now seen corresponding path program 334 times [2021-07-09 17:34:27,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:27,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843232479] [2021-07-09 17:34:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:27,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:27,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843232479] [2021-07-09 17:34:27,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843232479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:27,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173913772] [2021-07-09 17:34:27,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:27,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:27,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:27,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:27,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:27,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:27,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:27,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:27,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:27,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:27,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:27,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:27,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:27,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:27,838 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-07-09 17:34:27,942 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-07-09 17:34:27,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:27,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:27,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:27,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:27,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:27,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:27,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:28,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:28,020 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:28,025 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:28,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:28,030 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:28,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:28,034 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:28,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:28,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:28,086 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:189, output treesize:69 [2021-07-09 17:34:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:28,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173913772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:28,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:28,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789143203] [2021-07-09 17:34:28,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:28,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:28,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:28,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:28,248 INFO L87 Difference]: Start difference. First operand 1268 states and 4104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:28,819 INFO L93 Difference]: Finished difference Result 1619 states and 5073 transitions. [2021-07-09 17:34:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:28,822 INFO L225 Difference]: With dead ends: 1619 [2021-07-09 17:34:28,822 INFO L226 Difference]: Without dead ends: 1526 [2021-07-09 17:34:28,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-07-09 17:34:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1279. [2021-07-09 17:34:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 3.248043818466354) internal successors, (4151), 1278 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 4151 transitions. [2021-07-09 17:34:28,838 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 4151 transitions. Word has length 24 [2021-07-09 17:34:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:28,838 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 4151 transitions. [2021-07-09 17:34:28,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 4151 transitions. [2021-07-09 17:34:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:28,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:28,840 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:29,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2639,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:29,040 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:29,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:29,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1812306862, now seen corresponding path program 335 times [2021-07-09 17:34:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:29,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711158501] [2021-07-09 17:34:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:29,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711158501] [2021-07-09 17:34:29,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711158501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816151115] [2021-07-09 17:34:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:29,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:29,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:29,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:29,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:29,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:29,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:29,422 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:57 [2021-07-09 17:34:29,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:29,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:29,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:29,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:29,526 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:29,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:29,530 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:29,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:29,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:29,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:91, output treesize:31 [2021-07-09 17:34:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:29,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816151115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:29,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:29,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691067732] [2021-07-09 17:34:29,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:29,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:29,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:29,632 INFO L87 Difference]: Start difference. First operand 1279 states and 4151 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:30,195 INFO L93 Difference]: Finished difference Result 1465 states and 4704 transitions. [2021-07-09 17:34:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:30,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:30,197 INFO L225 Difference]: With dead ends: 1465 [2021-07-09 17:34:30,197 INFO L226 Difference]: Without dead ends: 1419 [2021-07-09 17:34:30,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-07-09 17:34:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1266. [2021-07-09 17:34:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.240316205533597) internal successors, (4099), 1265 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4099 transitions. [2021-07-09 17:34:30,212 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4099 transitions. Word has length 24 [2021-07-09 17:34:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:30,212 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4099 transitions. [2021-07-09 17:34:30,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4099 transitions. [2021-07-09 17:34:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:30,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:30,214 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:30,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2649,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:30,414 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1068438328, now seen corresponding path program 336 times [2021-07-09 17:34:30,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:30,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489464658] [2021-07-09 17:34:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:30,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:30,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489464658] [2021-07-09 17:34:30,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489464658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:30,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25025775] [2021-07-09 17:34:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:30,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:30,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:30,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:30,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:30,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:30,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:30,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-07-09 17:34:30,864 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1247], 1=[o_2, v_prenex_1248]} [2021-07-09 17:34:30,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:30,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:30,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:30,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:30,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:30,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:30,968 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:30,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:30,972 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:31,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:31,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:31,017 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:31,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:31,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:31,023 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:31,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:31,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:31,065 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-07-09 17:34:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:31,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25025775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:31,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:31,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:31,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634707595] [2021-07-09 17:34:31,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:31,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:31,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:31,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:31,176 INFO L87 Difference]: Start difference. First operand 1266 states and 4099 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,449 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-07-09 17:34:31,670 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-07-09 17:34:31,974 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-07-09 17:34:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:32,225 INFO L93 Difference]: Finished difference Result 1695 states and 5356 transitions. [2021-07-09 17:34:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:32,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:32,228 INFO L225 Difference]: With dead ends: 1695 [2021-07-09 17:34:32,228 INFO L226 Difference]: Without dead ends: 1621 [2021-07-09 17:34:32,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1144.8ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-07-09 17:34:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1270. [2021-07-09 17:34:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.2411347517730498) internal successors, (4113), 1269 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4113 transitions. [2021-07-09 17:34:32,244 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4113 transitions. Word has length 24 [2021-07-09 17:34:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:32,244 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4113 transitions. [2021-07-09 17:34:32,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4113 transitions. [2021-07-09 17:34:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:32,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:32,246 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:32,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2654 [2021-07-09 17:34:32,447 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2124296548, now seen corresponding path program 337 times [2021-07-09 17:34:32,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:32,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772531161] [2021-07-09 17:34:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:32,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:32,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772531161] [2021-07-09 17:34:32,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772531161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:32,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480304047] [2021-07-09 17:34:32,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:32,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:32,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:32,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:32,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:32,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:32,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:32,829 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:34:33,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:33,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:33,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,095 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.0 percent of original size [2021-07-09 17:34:33,095 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:33,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:33,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:33,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:33,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:33,139 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:33,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:33,143 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:33,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:33,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:33,175 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:34:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:33,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480304047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:33,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:33,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:33,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298116133] [2021-07-09 17:34:33,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:33,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:33,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:33,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:33,259 INFO L87 Difference]: Start difference. First operand 1270 states and 4113 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:33,664 INFO L93 Difference]: Finished difference Result 1490 states and 4774 transitions. [2021-07-09 17:34:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:33,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:33,667 INFO L225 Difference]: With dead ends: 1490 [2021-07-09 17:34:33,667 INFO L226 Difference]: Without dead ends: 1437 [2021-07-09 17:34:33,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-07-09 17:34:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1276. [2021-07-09 17:34:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.24078431372549) internal successors, (4132), 1275 states have internal predecessors, (4132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4132 transitions. [2021-07-09 17:34:33,682 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4132 transitions. Word has length 24 [2021-07-09 17:34:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:33,682 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4132 transitions. [2021-07-09 17:34:33,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4132 transitions. [2021-07-09 17:34:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:33,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:33,684 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:33,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2665 [2021-07-09 17:34:33,884 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 202340282, now seen corresponding path program 338 times [2021-07-09 17:34:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:33,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030031752] [2021-07-09 17:34:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:34,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:34,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030031752] [2021-07-09 17:34:34,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030031752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651671051] [2021-07-09 17:34:34,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:34,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:34,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:34,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:34,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:34,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:34:34,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:34,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:34,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:34,398 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:34,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:34,402 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:34,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:34,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:34,464 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:34,517 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:34,521 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:34,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:34,571 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:34:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:34,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651671051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:34,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:34,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413440016] [2021-07-09 17:34:34,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:34,725 INFO L87 Difference]: Start difference. First operand 1276 states and 4132 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:35,111 INFO L93 Difference]: Finished difference Result 1519 states and 4839 transitions. [2021-07-09 17:34:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:35,114 INFO L225 Difference]: With dead ends: 1519 [2021-07-09 17:34:35,114 INFO L226 Difference]: Without dead ends: 1453 [2021-07-09 17:34:35,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-07-09 17:34:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1273. [2021-07-09 17:34:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.240566037735849) internal successors, (4122), 1272 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4122 transitions. [2021-07-09 17:34:35,130 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4122 transitions. Word has length 24 [2021-07-09 17:34:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:35,130 INFO L482 AbstractCegarLoop]: Abstraction has 1273 states and 4122 transitions. [2021-07-09 17:34:35,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4122 transitions. [2021-07-09 17:34:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:35,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:35,131 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:35,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-07-09 17:34:35,332 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1823508822, now seen corresponding path program 339 times [2021-07-09 17:34:35,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:35,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269596468] [2021-07-09 17:34:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:35,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:35,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269596468] [2021-07-09 17:34:35,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269596468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:35,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023103894] [2021-07-09 17:34:35,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:35,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:35,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:35,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:35,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:35,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:35,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:35,839 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-07-09 17:34:35,944 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-07-09 17:34:35,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:35,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:35,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:35,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:35,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:36,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:36,022 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:36,027 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:36,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:36,032 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:36,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:36,036 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:36,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:36,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:36,089 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:189, output treesize:69 [2021-07-09 17:34:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:36,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023103894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:36,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:36,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:36,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908685238] [2021-07-09 17:34:36,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:36,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:36,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:36,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:36,244 INFO L87 Difference]: Start difference. First operand 1273 states and 4122 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:37,020 INFO L93 Difference]: Finished difference Result 1681 states and 5287 transitions. [2021-07-09 17:34:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:37,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:37,024 INFO L225 Difference]: With dead ends: 1681 [2021-07-09 17:34:37,024 INFO L226 Difference]: Without dead ends: 1588 [2021-07-09 17:34:37,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 909.1ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-07-09 17:34:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1284. [2021-07-09 17:34:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.249415432579891) internal successors, (4169), 1283 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4169 transitions. [2021-07-09 17:34:37,040 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4169 transitions. Word has length 24 [2021-07-09 17:34:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:37,040 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4169 transitions. [2021-07-09 17:34:37,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4169 transitions. [2021-07-09 17:34:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:37,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:37,042 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:37,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2686 [2021-07-09 17:34:37,242 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:37,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1049304452, now seen corresponding path program 340 times [2021-07-09 17:34:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:37,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083888567] [2021-07-09 17:34:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:37,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083888567] [2021-07-09 17:34:37,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083888567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846108083] [2021-07-09 17:34:37,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:37,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:37,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:37,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:37,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:37,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:37,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:37,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:37,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:37,815 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-07-09 17:34:37,944 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-07-09 17:34:37,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:37,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:37,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:37,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:37,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,036 INFO L628 ElimStorePlain]: treesize reduction 101, result has 41.6 percent of original size [2021-07-09 17:34:38,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:38,041 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:38,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:38,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:38,072 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-07-09 17:34:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:38,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846108083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:38,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:38,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:38,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114597491] [2021-07-09 17:34:38,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:38,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:38,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:38,154 INFO L87 Difference]: Start difference. First operand 1284 states and 4169 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:38,601 INFO L93 Difference]: Finished difference Result 1527 states and 4892 transitions. [2021-07-09 17:34:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:38,604 INFO L225 Difference]: With dead ends: 1527 [2021-07-09 17:34:38,604 INFO L226 Difference]: Without dead ends: 1455 [2021-07-09 17:34:38,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-07-09 17:34:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1271. [2021-07-09 17:34:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 3.2417322834645668) internal successors, (4117), 1270 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 4117 transitions. [2021-07-09 17:34:38,618 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 4117 transitions. Word has length 24 [2021-07-09 17:34:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:38,618 INFO L482 AbstractCegarLoop]: Abstraction has 1271 states and 4117 transitions. [2021-07-09 17:34:38,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 4117 transitions. [2021-07-09 17:34:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:38,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:38,620 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:38,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2698 [2021-07-09 17:34:38,820 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash 268376052, now seen corresponding path program 341 times [2021-07-09 17:34:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:38,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100519906] [2021-07-09 17:34:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:38,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100519906] [2021-07-09 17:34:38,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100519906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061323135] [2021-07-09 17:34:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:39,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:39,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:39,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:39,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-07-09 17:34:39,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:39,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-07-09 17:34:39,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:39,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:39,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,168 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-07-09 17:34:39,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:39,169 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-07-09 17:34:39,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:34:39,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:34:39,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,319 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-07-09 17:34:39,319 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:34:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:39,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,337 INFO L628 ElimStorePlain]: treesize reduction 15, result has 50.0 percent of original size [2021-07-09 17:34:39,337 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1265 vanished before elimination [2021-07-09 17:34:39,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,337 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:181, output treesize:15 [2021-07-09 17:34:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:39,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061323135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:39,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:34:39,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955452994] [2021-07-09 17:34:39,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:39,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:39,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:39,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:39,372 INFO L87 Difference]: Start difference. First operand 1271 states and 4117 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,636 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-07-09 17:34:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:39,733 INFO L93 Difference]: Finished difference Result 1461 states and 4622 transitions. [2021-07-09 17:34:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:39,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:39,736 INFO L225 Difference]: With dead ends: 1461 [2021-07-09 17:34:39,736 INFO L226 Difference]: Without dead ends: 1402 [2021-07-09 17:34:39,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-07-09 17:34:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1272. [2021-07-09 17:34:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.242328874901652) internal successors, (4121), 1271 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4121 transitions. [2021-07-09 17:34:39,751 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4121 transitions. Word has length 24 [2021-07-09 17:34:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:39,751 INFO L482 AbstractCegarLoop]: Abstraction has 1272 states and 4121 transitions. [2021-07-09 17:34:39,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4121 transitions. [2021-07-09 17:34:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:39,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:39,752 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:39,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2708,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:39,953 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1469595764, now seen corresponding path program 342 times [2021-07-09 17:34:39,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:39,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776258106] [2021-07-09 17:34:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:40,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:40,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776258106] [2021-07-09 17:34:40,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776258106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:40,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305499384] [2021-07-09 17:34:40,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:40,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:40,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:40,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:40,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:40,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:40,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:40,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:40,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:40,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:34:40,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:40,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:40,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:40,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:40,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:40,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:40,342 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:40,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:40,346 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:40,350 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:40,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:40,354 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:40,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:40,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:40,392 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:157, output treesize:57 [2021-07-09 17:34:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:40,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305499384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:40,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:40,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:40,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451981376] [2021-07-09 17:34:40,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:40,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:40,483 INFO L87 Difference]: Start difference. First operand 1272 states and 4121 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:41,322 INFO L93 Difference]: Finished difference Result 1647 states and 5111 transitions. [2021-07-09 17:34:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:34:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:41,325 INFO L225 Difference]: With dead ends: 1647 [2021-07-09 17:34:41,325 INFO L226 Difference]: Without dead ends: 1516 [2021-07-09 17:34:41,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 763.6ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-09 17:34:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1282. [2021-07-09 17:34:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.2388758782201403) internal successors, (4149), 1281 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4149 transitions. [2021-07-09 17:34:41,347 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4149 transitions. Word has length 24 [2021-07-09 17:34:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:41,347 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4149 transitions. [2021-07-09 17:34:41,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4149 transitions. [2021-07-09 17:34:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:41,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:41,349 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:41,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:41,551 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:41,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2007088620, now seen corresponding path program 343 times [2021-07-09 17:34:41,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:41,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664070568] [2021-07-09 17:34:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:41,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:41,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664070568] [2021-07-09 17:34:41,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664070568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:41,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397389074] [2021-07-09 17:34:41,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:41,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:41,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:41,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:41,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:41,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:41,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:41,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:97, output treesize:81 [2021-07-09 17:34:41,936 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1269], 1=[o_0, v_prenex_1268]} [2021-07-09 17:34:41,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:41,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:41,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,022 INFO L628 ElimStorePlain]: treesize reduction 61, result has 64.7 percent of original size [2021-07-09 17:34:42,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-07-09 17:34:42,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:42,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:42,062 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:42,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:42,066 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:42,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:42,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:34:42,100 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:42,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:42,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:42,132 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:185, output treesize:47 [2021-07-09 17:34:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:42,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397389074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:42,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:42,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:42,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444464140] [2021-07-09 17:34:42,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:42,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:42,210 INFO L87 Difference]: Start difference. First operand 1282 states and 4149 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:42,457 INFO L93 Difference]: Finished difference Result 1473 states and 4655 transitions. [2021-07-09 17:34:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:42,459 INFO L225 Difference]: With dead ends: 1473 [2021-07-09 17:34:42,459 INFO L226 Difference]: Without dead ends: 1420 [2021-07-09 17:34:42,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-07-09 17:34:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1282. [2021-07-09 17:34:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.2388758782201403) internal successors, (4149), 1281 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4149 transitions. [2021-07-09 17:34:42,474 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4149 transitions. Word has length 24 [2021-07-09 17:34:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:42,474 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4149 transitions. [2021-07-09 17:34:42,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4149 transitions. [2021-07-09 17:34:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:42,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:42,475 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:42,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2720,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:42,676 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:42,676 INFO L82 PathProgramCache]: Analyzing trace with hash 787383338, now seen corresponding path program 344 times [2021-07-09 17:34:42,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:42,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572543135] [2021-07-09 17:34:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:42,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:42,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572543135] [2021-07-09 17:34:42,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572543135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:42,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127710186] [2021-07-09 17:34:42,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:42,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:42,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:42,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:42,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:34:42,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:42,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:42,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:66 [2021-07-09 17:34:42,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-07-09 17:34:42,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:42,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 17:34:42,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-07-09 17:34:42,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 17:34:42,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:43,057 INFO L628 ElimStorePlain]: treesize reduction 8, result has 90.6 percent of original size [2021-07-09 17:34:43,057 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:43,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:43,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:183, output treesize:77 [2021-07-09 17:34:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:43,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127710186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:43,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 17:34:43,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518608500] [2021-07-09 17:34:43,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:34:43,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:34:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:34:43,134 INFO L87 Difference]: Start difference. First operand 1282 states and 4149 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:43,395 INFO L93 Difference]: Finished difference Result 1566 states and 4893 transitions. [2021-07-09 17:34:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:43,398 INFO L225 Difference]: With dead ends: 1566 [2021-07-09 17:34:43,398 INFO L226 Difference]: Without dead ends: 1523 [2021-07-09 17:34:43,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-07-09 17:34:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1282. [2021-07-09 17:34:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.2388758782201403) internal successors, (4149), 1281 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4149 transitions. [2021-07-09 17:34:43,415 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4149 transitions. Word has length 24 [2021-07-09 17:34:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:43,415 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4149 transitions. [2021-07-09 17:34:43,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4149 transitions. [2021-07-09 17:34:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:43,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:43,416 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:43,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2726 [2021-07-09 17:34:43,617 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1025053358, now seen corresponding path program 345 times [2021-07-09 17:34:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:43,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555446597] [2021-07-09 17:34:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:43,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:43,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555446597] [2021-07-09 17:34:43,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555446597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104460262] [2021-07-09 17:34:43,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:43,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:43,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:43,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:43,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:43,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:43,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:43,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:43,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:65 [2021-07-09 17:34:44,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:44,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:44,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,102 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-07-09 17:34:44,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:44,105 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:44,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:44,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,116 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:103, output treesize:12 [2021-07-09 17:34:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:44,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104460262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:44,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649164560] [2021-07-09 17:34:44,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:44,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:44,154 INFO L87 Difference]: Start difference. First operand 1282 states and 4149 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:44,462 INFO L93 Difference]: Finished difference Result 1473 states and 4643 transitions. [2021-07-09 17:34:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:44,464 INFO L225 Difference]: With dead ends: 1473 [2021-07-09 17:34:44,464 INFO L226 Difference]: Without dead ends: 1418 [2021-07-09 17:34:44,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-07-09 17:34:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1282. [2021-07-09 17:34:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.2388758782201403) internal successors, (4149), 1281 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4149 transitions. [2021-07-09 17:34:44,479 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4149 transitions. Word has length 24 [2021-07-09 17:34:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:44,479 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4149 transitions. [2021-07-09 17:34:44,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4149 transitions. [2021-07-09 17:34:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:44,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:44,481 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:44,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-07-09 17:34:44,681 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash 994449266, now seen corresponding path program 346 times [2021-07-09 17:34:44,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:44,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602248249] [2021-07-09 17:34:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:44,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:44,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602248249] [2021-07-09 17:34:44,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602248249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603020729] [2021-07-09 17:34:44,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:44,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:44,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:44,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:44,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:44,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:44,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:45,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:45,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:77 [2021-07-09 17:34:45,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:45,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:34:45,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,163 INFO L628 ElimStorePlain]: treesize reduction 56, result has 64.3 percent of original size [2021-07-09 17:34:45,164 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:45,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:45,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:45,208 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:45,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:45,211 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:45,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:45,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:45,246 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:47 [2021-07-09 17:34:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:45,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603020729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:45,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:45,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153286873] [2021-07-09 17:34:45,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:45,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:45,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:45,323 INFO L87 Difference]: Start difference. First operand 1282 states and 4149 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:45,565 INFO L93 Difference]: Finished difference Result 1473 states and 4655 transitions. [2021-07-09 17:34:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:45,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:45,568 INFO L225 Difference]: With dead ends: 1473 [2021-07-09 17:34:45,568 INFO L226 Difference]: Without dead ends: 1420 [2021-07-09 17:34:45,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-07-09 17:34:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1280. [2021-07-09 17:34:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.240031274433151) internal successors, (4144), 1279 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4144 transitions. [2021-07-09 17:34:45,582 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4144 transitions. Word has length 24 [2021-07-09 17:34:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:45,583 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4144 transitions. [2021-07-09 17:34:45,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4144 transitions. [2021-07-09 17:34:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:45,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:45,584 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:45,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2737,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:45,785 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1913755660, now seen corresponding path program 347 times [2021-07-09 17:34:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:45,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566693816] [2021-07-09 17:34:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:45,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:45,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566693816] [2021-07-09 17:34:45,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566693816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801792003] [2021-07-09 17:34:45,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:45,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:45,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:46,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:46,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:46,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:46,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:46,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:46,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:46,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:46,256 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:34:46,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:46,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:46,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,480 INFO L628 ElimStorePlain]: treesize reduction 57, result has 38.7 percent of original size [2021-07-09 17:34:46,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:46,483 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:46,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:46,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:103, output treesize:12 [2021-07-09 17:34:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:46,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801792003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:46,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:46,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:46,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623582496] [2021-07-09 17:34:46,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:46,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:46,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:46,533 INFO L87 Difference]: Start difference. First operand 1280 states and 4144 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:47,087 INFO L93 Difference]: Finished difference Result 1506 states and 4736 transitions. [2021-07-09 17:34:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:47,089 INFO L225 Difference]: With dead ends: 1506 [2021-07-09 17:34:47,089 INFO L226 Difference]: Without dead ends: 1427 [2021-07-09 17:34:47,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-09 17:34:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1282. [2021-07-09 17:34:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.2443403590944575) internal successors, (4156), 1281 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4156 transitions. [2021-07-09 17:34:47,113 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4156 transitions. Word has length 24 [2021-07-09 17:34:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:47,113 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4156 transitions. [2021-07-09 17:34:47,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4156 transitions. [2021-07-09 17:34:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:47,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:47,115 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:47,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2745,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:47,315 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:47,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash -476468174, now seen corresponding path program 348 times [2021-07-09 17:34:47,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:47,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574210488] [2021-07-09 17:34:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:47,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574210488] [2021-07-09 17:34:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574210488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930963582] [2021-07-09 17:34:47,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:47,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:47,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:47,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:47,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:47,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:47,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:47,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:47,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:47,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-07-09 17:34:47,644 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-07-09 17:34:47,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:47,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:47,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:47,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:47,673 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:47,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:47,676 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:47,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:47,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:47,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-07-09 17:34:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:47,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930963582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:47,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:47,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202111088] [2021-07-09 17:34:47,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:47,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:47,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:47,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:47,748 INFO L87 Difference]: Start difference. First operand 1282 states and 4156 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:48,205 INFO L93 Difference]: Finished difference Result 1492 states and 4735 transitions. [2021-07-09 17:34:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:48,208 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 17:34:48,208 INFO L226 Difference]: Without dead ends: 1433 [2021-07-09 17:34:48,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-07-09 17:34:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1285. [2021-07-09 17:34:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.2398753894080996) internal successors, (4160), 1284 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4160 transitions. [2021-07-09 17:34:48,222 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4160 transitions. Word has length 24 [2021-07-09 17:34:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:48,223 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 4160 transitions. [2021-07-09 17:34:48,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4160 transitions. [2021-07-09 17:34:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:48,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:48,224 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:48,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:48,425 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1171100684, now seen corresponding path program 349 times [2021-07-09 17:34:48,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:48,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371774748] [2021-07-09 17:34:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:48,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:48,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371774748] [2021-07-09 17:34:48,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371774748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:48,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119103622] [2021-07-09 17:34:48,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:48,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:48,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:48,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:48,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:48,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:48,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:48,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:48,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:48,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:48,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:48,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:48,907 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:34:49,077 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:49,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:49,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:49,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:49,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:49,118 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:49,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:49,122 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:49,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:49,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:49,149 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:34 [2021-07-09 17:34:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:49,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119103622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:49,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:49,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:49,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045298950] [2021-07-09 17:34:49,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:49,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:49,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:49,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:49,219 INFO L87 Difference]: Start difference. First operand 1285 states and 4160 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:49,631 INFO L93 Difference]: Finished difference Result 1478 states and 4715 transitions. [2021-07-09 17:34:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:49,633 INFO L225 Difference]: With dead ends: 1478 [2021-07-09 17:34:49,633 INFO L226 Difference]: Without dead ends: 1447 [2021-07-09 17:34:49,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 545.4ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-07-09 17:34:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1278. [2021-07-09 17:34:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.241190289741582) internal successors, (4139), 1277 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4139 transitions. [2021-07-09 17:34:49,648 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4139 transitions. Word has length 24 [2021-07-09 17:34:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:49,648 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4139 transitions. [2021-07-09 17:34:49,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4139 transitions. [2021-07-09 17:34:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:49,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:49,650 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:49,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-07-09 17:34:49,850 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1344992854, now seen corresponding path program 350 times [2021-07-09 17:34:49,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:49,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943567881] [2021-07-09 17:34:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:50,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:50,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943567881] [2021-07-09 17:34:50,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943567881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857329176] [2021-07-09 17:34:50,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:50,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:50,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:50,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:50,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:50,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:50,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:50,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:50,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:50,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:50,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:34:50,394 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-07-09 17:34:50,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:50,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:50,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:50,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:50,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:50,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:50,477 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:50,482 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:50,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:50,487 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:50,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:50,492 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:50,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:50,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:50,550 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:201, output treesize:75 [2021-07-09 17:34:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857329176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:50,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:34:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602508737] [2021-07-09 17:34:50,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:50,654 INFO L87 Difference]: Start difference. First operand 1278 states and 4139 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:51,148 INFO L93 Difference]: Finished difference Result 1584 states and 4993 transitions. [2021-07-09 17:34:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:51,151 INFO L225 Difference]: With dead ends: 1584 [2021-07-09 17:34:51,151 INFO L226 Difference]: Without dead ends: 1537 [2021-07-09 17:34:51,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-07-09 17:34:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1283. [2021-07-09 17:34:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.2488299531981277) internal successors, (4165), 1282 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4165 transitions. [2021-07-09 17:34:51,167 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4165 transitions. Word has length 24 [2021-07-09 17:34:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:51,167 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4165 transitions. [2021-07-09 17:34:51,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4165 transitions. [2021-07-09 17:34:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:51,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:51,169 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:51,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,369 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:51,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2069700906, now seen corresponding path program 351 times [2021-07-09 17:34:51,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:51,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839631093] [2021-07-09 17:34:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:51,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839631093] [2021-07-09 17:34:51,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839631093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934714948] [2021-07-09 17:34:51,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:51,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:51,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:51,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:51,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:51,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:51,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:51,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:51,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-07-09 17:34:51,727 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:34:51,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:51,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:51,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:51,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:51,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:51,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:51,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:51,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:51,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:51,833 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:51,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:51,838 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:51,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:51,842 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:51,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:51,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:51,847 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:51,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:51,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:51,912 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:81 [2021-07-09 17:34:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934714948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:52,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:52,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:52,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575227829] [2021-07-09 17:34:52,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:52,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:52,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:52,058 INFO L87 Difference]: Start difference. First operand 1283 states and 4165 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:52,760 INFO L93 Difference]: Finished difference Result 1589 states and 5001 transitions. [2021-07-09 17:34:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:52,763 INFO L225 Difference]: With dead ends: 1589 [2021-07-09 17:34:52,763 INFO L226 Difference]: Without dead ends: 1548 [2021-07-09 17:34:52,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 688.2ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-07-09 17:34:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1278. [2021-07-09 17:34:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.241190289741582) internal successors, (4139), 1277 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4139 transitions. [2021-07-09 17:34:52,779 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4139 transitions. Word has length 24 [2021-07-09 17:34:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:52,779 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4139 transitions. [2021-07-09 17:34:52,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4139 transitions. [2021-07-09 17:34:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:52,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:52,781 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:52,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2780,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:52,981 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash -511221484, now seen corresponding path program 352 times [2021-07-09 17:34:52,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:52,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285560357] [2021-07-09 17:34:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:53,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285560357] [2021-07-09 17:34:53,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285560357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189560578] [2021-07-09 17:34:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:53,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:53,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:53,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:53,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:53,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:53,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:53,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:53,331 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:34:53,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:53,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:53,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,587 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.4 percent of original size [2021-07-09 17:34:53,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:53,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:53,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:53,627 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1292 vanished before elimination [2021-07-09 17:34:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:53,631 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:53,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:53,634 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:53,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:53,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:53,667 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:34:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:53,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189560578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:53,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:53,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:53,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640948292] [2021-07-09 17:34:53,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:53,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:53,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:53,751 INFO L87 Difference]: Start difference. First operand 1278 states and 4139 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:54,061 INFO L93 Difference]: Finished difference Result 1467 states and 4643 transitions. [2021-07-09 17:34:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:54,064 INFO L225 Difference]: With dead ends: 1467 [2021-07-09 17:34:54,064 INFO L226 Difference]: Without dead ends: 1414 [2021-07-09 17:34:54,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-09 17:34:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1281. [2021-07-09 17:34:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.24140625) internal successors, (4149), 1280 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4149 transitions. [2021-07-09 17:34:54,078 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4149 transitions. Word has length 24 [2021-07-09 17:34:54,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:54,078 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4149 transitions. [2021-07-09 17:34:54,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4149 transitions. [2021-07-09 17:34:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:54,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:54,080 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:54,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2789 [2021-07-09 17:34:54,280 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1815415346, now seen corresponding path program 353 times [2021-07-09 17:34:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:54,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724411929] [2021-07-09 17:34:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:54,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724411929] [2021-07-09 17:34:54,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724411929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827488434] [2021-07-09 17:34:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:54,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:54,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:54,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:54,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:54,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:34:54,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:54,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:54,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:54,715 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:54,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:54,720 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:54,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:54,781 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:54,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:54,840 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:54,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:54,844 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:54,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:54,894 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:34:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:54,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827488434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:54,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:54,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:34:54,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795042703] [2021-07-09 17:34:54,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:54,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:54,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:54,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:54,996 INFO L87 Difference]: Start difference. First operand 1281 states and 4149 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:55,352 INFO L93 Difference]: Finished difference Result 1535 states and 4853 transitions. [2021-07-09 17:34:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:55,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:55,354 INFO L225 Difference]: With dead ends: 1535 [2021-07-09 17:34:55,354 INFO L226 Difference]: Without dead ends: 1488 [2021-07-09 17:34:55,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-07-09 17:34:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1286. [2021-07-09 17:34:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.2490272373540856) internal successors, (4175), 1285 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 4175 transitions. [2021-07-09 17:34:55,369 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 4175 transitions. Word has length 24 [2021-07-09 17:34:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:55,369 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 4175 transitions. [2021-07-09 17:34:55,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 4175 transitions. [2021-07-09 17:34:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:55,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:55,371 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:55,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2798,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,571 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash 935141810, now seen corresponding path program 354 times [2021-07-09 17:34:55,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:55,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490265953] [2021-07-09 17:34:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:55,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490265953] [2021-07-09 17:34:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490265953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126508811] [2021-07-09 17:34:55,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:55,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:55,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:55,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:55,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:55,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:55,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:55,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:55,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:55,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:34:56,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:56,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:56,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,224 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-07-09 17:34:56,224 INFO L628 ElimStorePlain]: treesize reduction 164, result has 55.1 percent of original size [2021-07-09 17:34:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:56,230 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:56,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:56,235 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:56,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:56,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:56,315 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:56,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:34:56,392 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:56,466 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:56,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:56,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:34:56,537 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:56,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1302 vanished before elimination [2021-07-09 17:34:56,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1304 vanished before elimination [2021-07-09 17:34:56,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:34:56,603 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-07-09 17:34:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:34:56,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126508811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:56,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:56,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:34:56,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101844491] [2021-07-09 17:34:56,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:56,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:56,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:56,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:56,740 INFO L87 Difference]: Start difference. First operand 1286 states and 4175 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:56,993 INFO L93 Difference]: Finished difference Result 1509 states and 4754 transitions. [2021-07-09 17:34:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:56,995 INFO L225 Difference]: With dead ends: 1509 [2021-07-09 17:34:56,996 INFO L226 Difference]: Without dead ends: 1453 [2021-07-09 17:34:56,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-07-09 17:34:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1280. [2021-07-09 17:34:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2439405785770132) internal successors, (4149), 1279 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4149 transitions. [2021-07-09 17:34:57,010 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4149 transitions. Word has length 24 [2021-07-09 17:34:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:57,010 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4149 transitions. [2021-07-09 17:34:57,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4149 transitions. [2021-07-09 17:34:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:57,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:57,012 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:57,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:57,212 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1356230344, now seen corresponding path program 355 times [2021-07-09 17:34:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135632003] [2021-07-09 17:34:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:57,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:57,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135632003] [2021-07-09 17:34:57,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135632003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:57,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075165220] [2021-07-09 17:34:57,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:34:57,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:57,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:57,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:57,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:57,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:57,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:57,625 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-07-09 17:34:57,823 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1309, o_2], 1=[o_0, v_prenex_1308]} [2021-07-09 17:34:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:57,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:57,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,907 INFO L628 ElimStorePlain]: treesize reduction 55, result has 65.6 percent of original size [2021-07-09 17:34:57,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:34:57,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:57,942 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:34:57,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:57,946 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:57,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:34:57,950 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:57,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:57,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:57,982 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:47 [2021-07-09 17:34:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075165220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:58,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:58,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:58,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660304026] [2021-07-09 17:34:58,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:58,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:58,068 INFO L87 Difference]: Start difference. First operand 1280 states and 4149 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:58,555 INFO L93 Difference]: Finished difference Result 1728 states and 5380 transitions. [2021-07-09 17:34:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:58,557 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 17:34:58,557 INFO L226 Difference]: Without dead ends: 1671 [2021-07-09 17:34:58,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 755.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-07-09 17:34:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1283. [2021-07-09 17:34:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.2441497659906395) internal successors, (4159), 1282 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4159 transitions. [2021-07-09 17:34:58,574 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4159 transitions. Word has length 24 [2021-07-09 17:34:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:58,574 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4159 transitions. [2021-07-09 17:34:58,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4159 transitions. [2021-07-09 17:34:58,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:58,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:58,576 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:58,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2818,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:58,776 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:58,776 INFO L82 PathProgramCache]: Analyzing trace with hash 621770154, now seen corresponding path program 356 times [2021-07-09 17:34:58,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:58,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644704147] [2021-07-09 17:34:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:58,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:58,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644704147] [2021-07-09 17:34:58,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644704147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:58,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022965763] [2021-07-09 17:34:58,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:58,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:58,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:34:58,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:59,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:59,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:59,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:59,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:59,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-07-09 17:34:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:34:59,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:59,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:59,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:34:59,200 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:59,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:59,204 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:59,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:59,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:59,222 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:27 [2021-07-09 17:34:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:59,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022965763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:59,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:59,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:34:59,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306211918] [2021-07-09 17:34:59,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:59,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:59,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:59,275 INFO L87 Difference]: Start difference. First operand 1283 states and 4159 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:59,592 INFO L93 Difference]: Finished difference Result 1650 states and 5210 transitions. [2021-07-09 17:34:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:34:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:59,595 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 17:34:59,595 INFO L226 Difference]: Without dead ends: 1611 [2021-07-09 17:34:59,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:59,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-07-09 17:34:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1286. [2021-07-09 17:34:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.2443579766536965) internal successors, (4169), 1285 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 4169 transitions. [2021-07-09 17:34:59,611 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 4169 transitions. Word has length 24 [2021-07-09 17:34:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:59,611 INFO L482 AbstractCegarLoop]: Abstraction has 1286 states and 4169 transitions. [2021-07-09 17:34:59,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 4169 transitions. [2021-07-09 17:34:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:34:59,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:59,612 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:59,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2826 [2021-07-09 17:34:59,813 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:59,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1346560312, now seen corresponding path program 357 times [2021-07-09 17:34:59,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:59,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334977190] [2021-07-09 17:34:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:34:59,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:59,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334977190] [2021-07-09 17:34:59,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334977190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:59,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385649389] [2021-07-09 17:34:59,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:00,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:35:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:00,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:00,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:00,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:00,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:00,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:00,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:00,131 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-07-09 17:35:00,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:00,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:00,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,525 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-07-09 17:35:00,525 INFO L628 ElimStorePlain]: treesize reduction 162, result has 55.5 percent of original size [2021-07-09 17:35:00,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:35:00,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:00,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:00,686 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:00,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,756 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1319 vanished before elimination [2021-07-09 17:35:00,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:00,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:00,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1316 vanished before elimination [2021-07-09 17:35:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:00,835 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:00,840 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:00,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:35:00,905 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-07-09 17:35:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:01,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385649389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:01,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:01,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:01,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641161967] [2021-07-09 17:35:01,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:01,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:01,051 INFO L87 Difference]: Start difference. First operand 1286 states and 4169 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:02,036 INFO L93 Difference]: Finished difference Result 1836 states and 5665 transitions. [2021-07-09 17:35:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:02,040 INFO L225 Difference]: With dead ends: 1836 [2021-07-09 17:35:02,040 INFO L226 Difference]: Without dead ends: 1713 [2021-07-09 17:35:02,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1057.1ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-07-09 17:35:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1293. [2021-07-09 17:35:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.2523219814241484) internal successors, (4202), 1292 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4202 transitions. [2021-07-09 17:35:02,057 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4202 transitions. Word has length 24 [2021-07-09 17:35:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:02,057 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4202 transitions. [2021-07-09 17:35:02,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4202 transitions. [2021-07-09 17:35:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:02,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:02,059 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:02,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2832 [2021-07-09 17:35:02,259 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2068133448, now seen corresponding path program 358 times [2021-07-09 17:35:02,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:02,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889248361] [2021-07-09 17:35:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:02,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:02,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889248361] [2021-07-09 17:35:02,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889248361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:02,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337273261] [2021-07-09 17:35:02,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:02,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:02,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:02,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:02,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:02,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:02,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:02,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:02,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-07-09 17:35:02,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:02,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:02,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,007 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-07-09 17:35:03,008 INFO L628 ElimStorePlain]: treesize reduction 164, result has 55.1 percent of original size [2021-07-09 17:35:03,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:35:03,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:03,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:03,091 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:03,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:03,096 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:03,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:03,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:03,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:03,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:35:03,253 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:03,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:03,325 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:03,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:03,388 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1327 vanished before elimination [2021-07-09 17:35:03,388 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1326 vanished before elimination [2021-07-09 17:35:03,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:35:03,390 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-07-09 17:35:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:03,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337273261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:03,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:03,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:03,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301081149] [2021-07-09 17:35:03,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:03,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:03,530 INFO L87 Difference]: Start difference. First operand 1293 states and 4202 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,805 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-07-09 17:35:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:04,025 INFO L93 Difference]: Finished difference Result 1686 states and 5290 transitions. [2021-07-09 17:35:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:04,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:04,028 INFO L225 Difference]: With dead ends: 1686 [2021-07-09 17:35:04,028 INFO L226 Difference]: Without dead ends: 1638 [2021-07-09 17:35:04,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-07-09 17:35:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1283. [2021-07-09 17:35:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.2480499219968797) internal successors, (4164), 1282 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4164 transitions. [2021-07-09 17:35:04,045 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4164 transitions. Word has length 24 [2021-07-09 17:35:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:04,045 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4164 transitions. [2021-07-09 17:35:04,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4164 transitions. [2021-07-09 17:35:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:04,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:04,047 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:04,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2844 [2021-07-09 17:35:04,247 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1896509600, now seen corresponding path program 359 times [2021-07-09 17:35:04,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:04,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202828955] [2021-07-09 17:35:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202828955] [2021-07-09 17:35:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202828955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714527903] [2021-07-09 17:35:04,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:04,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:04,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:04,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:04,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:04,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:04,645 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:65 [2021-07-09 17:35:04,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:04,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:04,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,770 INFO L628 ElimStorePlain]: treesize reduction 51, result has 41.4 percent of original size [2021-07-09 17:35:04,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:04,773 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:04,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:04,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,784 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:103, output treesize:12 [2021-07-09 17:35:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714527903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:04,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:04,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:04,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036619211] [2021-07-09 17:35:04,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:04,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:04,816 INFO L87 Difference]: Start difference. First operand 1283 states and 4164 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:05,059 INFO L93 Difference]: Finished difference Result 1384 states and 4406 transitions. [2021-07-09 17:35:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:05,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:05,062 INFO L225 Difference]: With dead ends: 1384 [2021-07-09 17:35:05,062 INFO L226 Difference]: Without dead ends: 1325 [2021-07-09 17:35:05,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-07-09 17:35:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1285. [2021-07-09 17:35:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.248442367601246) internal successors, (4171), 1284 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4171 transitions. [2021-07-09 17:35:05,076 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4171 transitions. Word has length 24 [2021-07-09 17:35:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:05,076 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 4171 transitions. [2021-07-09 17:35:05,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4171 transitions. [2021-07-09 17:35:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:05,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:05,078 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:05,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2856,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:05,279 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 158537784, now seen corresponding path program 360 times [2021-07-09 17:35:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:05,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91463872] [2021-07-09 17:35:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:05,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91463872] [2021-07-09 17:35:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91463872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355989537] [2021-07-09 17:35:05,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:05,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:05,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:05,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:05,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:05,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:35:05,715 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:05,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:05,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:05,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:05,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:05,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:05,795 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:05,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:05,802 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:05,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:05,806 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:05,810 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:05,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:05,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:05,866 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:57 [2021-07-09 17:35:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:05,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355989537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:05,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:05,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937233191] [2021-07-09 17:35:05,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:05,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:05,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:05,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:05,967 INFO L87 Difference]: Start difference. First operand 1285 states and 4171 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:06,413 INFO L93 Difference]: Finished difference Result 1448 states and 4613 transitions. [2021-07-09 17:35:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:06,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:06,416 INFO L225 Difference]: With dead ends: 1448 [2021-07-09 17:35:06,416 INFO L226 Difference]: Without dead ends: 1382 [2021-07-09 17:35:06,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-07-09 17:35:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1285. [2021-07-09 17:35:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.248442367601246) internal successors, (4171), 1284 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4171 transitions. [2021-07-09 17:35:06,431 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4171 transitions. Word has length 24 [2021-07-09 17:35:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:06,431 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 4171 transitions. [2021-07-09 17:35:06,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4171 transitions. [2021-07-09 17:35:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:06,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:06,433 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:06,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2861 [2021-07-09 17:35:06,633 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash -378955072, now seen corresponding path program 361 times [2021-07-09 17:35:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:06,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392778297] [2021-07-09 17:35:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:06,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:06,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392778297] [2021-07-09 17:35:06,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392778297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:06,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73421879] [2021-07-09 17:35:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:06,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:06,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:06,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:06,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:06,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2021-07-09 17:35:07,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:07,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:07,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:07,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:07,043 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:07,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:07,047 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:07,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:07,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:07,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-07-09 17:35:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:07,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73421879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:07,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:07,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003268459] [2021-07-09 17:35:07,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:07,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:07,167 INFO L87 Difference]: Start difference. First operand 1285 states and 4171 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:07,450 INFO L93 Difference]: Finished difference Result 1380 states and 4410 transitions. [2021-07-09 17:35:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:07,452 INFO L225 Difference]: With dead ends: 1380 [2021-07-09 17:35:07,452 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 17:35:07,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 17:35:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1287. [2021-07-09 17:35:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 3.2472783825816487) internal successors, (4176), 1286 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4176 transitions. [2021-07-09 17:35:07,467 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4176 transitions. Word has length 24 [2021-07-09 17:35:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:07,467 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 4176 transitions. [2021-07-09 17:35:07,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4176 transitions. [2021-07-09 17:35:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:07,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:07,468 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:07,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2871 [2021-07-09 17:35:07,669 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1007807298, now seen corresponding path program 362 times [2021-07-09 17:35:07,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:07,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591947573] [2021-07-09 17:35:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:07,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591947573] [2021-07-09 17:35:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591947573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749421923] [2021-07-09 17:35:07,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:07,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:07,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:07,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:07,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:07,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:07,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:08,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:08,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:08,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:08,097 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:35:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:08,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:08,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:35:08,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:08,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:11 [2021-07-09 17:35:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:08,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749421923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:08,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:08,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:08,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222246647] [2021-07-09 17:35:08,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:08,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:08,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:08,350 INFO L87 Difference]: Start difference. First operand 1287 states and 4176 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:08,896 INFO L93 Difference]: Finished difference Result 1459 states and 4614 transitions. [2021-07-09 17:35:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:08,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:08,898 INFO L225 Difference]: With dead ends: 1459 [2021-07-09 17:35:08,898 INFO L226 Difference]: Without dead ends: 1401 [2021-07-09 17:35:08,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-07-09 17:35:08,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1302. [2021-07-09 17:35:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.2467332820906996) internal successors, (4224), 1301 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4224 transitions. [2021-07-09 17:35:08,914 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4224 transitions. Word has length 24 [2021-07-09 17:35:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:08,914 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4224 transitions. [2021-07-09 17:35:08,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4224 transitions. [2021-07-09 17:35:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:08,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:08,916 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:09,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2876,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:09,117 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash -730164518, now seen corresponding path program 363 times [2021-07-09 17:35:09,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:09,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015566381] [2021-07-09 17:35:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:09,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:09,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015566381] [2021-07-09 17:35:09,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015566381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:09,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948348858] [2021-07-09 17:35:09,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:09,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:09,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:09,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:09,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:09,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:09,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:09,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:09,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:09,592 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:35:09,745 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:09,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:09,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:09,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:09,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:09,783 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:09,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:09,787 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:09,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:09,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:09,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-07-09 17:35:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:09,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948348858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:09,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:09,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665053763] [2021-07-09 17:35:09,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:09,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:09,883 INFO L87 Difference]: Start difference. First operand 1302 states and 4224 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:10,483 INFO L93 Difference]: Finished difference Result 1599 states and 4990 transitions. [2021-07-09 17:35:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:10,486 INFO L225 Difference]: With dead ends: 1599 [2021-07-09 17:35:10,486 INFO L226 Difference]: Without dead ends: 1537 [2021-07-09 17:35:10,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-07-09 17:35:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1300. [2021-07-09 17:35:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.24788298691301) internal successors, (4219), 1299 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4219 transitions. [2021-07-09 17:35:10,502 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4219 transitions. Word has length 24 [2021-07-09 17:35:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:10,502 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4219 transitions. [2021-07-09 17:35:10,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4219 transitions. [2021-07-09 17:35:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:10,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:10,504 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:10,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2883 [2021-07-09 17:35:10,704 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1223918304, now seen corresponding path program 364 times [2021-07-09 17:35:10,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:10,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799833492] [2021-07-09 17:35:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:10,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799833492] [2021-07-09 17:35:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799833492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764573770] [2021-07-09 17:35:10,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:10,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:10,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:10,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:10,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:10,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:10,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:10,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:11,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:11,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:11,111 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:35:11,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:11,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:35:11,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:11 [2021-07-09 17:35:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:11,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764573770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:11,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:35:11,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738515548] [2021-07-09 17:35:11,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:35:11,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:11,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:35:11,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:35:11,309 INFO L87 Difference]: Start difference. First operand 1300 states and 4219 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:11,531 INFO L93 Difference]: Finished difference Result 1432 states and 4550 transitions. [2021-07-09 17:35:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:11,534 INFO L225 Difference]: With dead ends: 1432 [2021-07-09 17:35:11,534 INFO L226 Difference]: Without dead ends: 1401 [2021-07-09 17:35:11,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-07-09 17:35:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1295. [2021-07-09 17:35:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.2519319938176197) internal successors, (4208), 1294 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4208 transitions. [2021-07-09 17:35:11,549 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4208 transitions. Word has length 24 [2021-07-09 17:35:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:11,549 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4208 transitions. [2021-07-09 17:35:11,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4208 transitions. [2021-07-09 17:35:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:11,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:11,551 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:11,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-07-09 17:35:11,752 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1750462274, now seen corresponding path program 365 times [2021-07-09 17:35:11,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:11,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862967367] [2021-07-09 17:35:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:11,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862967367] [2021-07-09 17:35:11,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862967367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186831324] [2021-07-09 17:35:11,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:12,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:35:12,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:12,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:12,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:12,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:12,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:12,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:12,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:12,245 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-07-09 17:35:12,422 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:12,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:12,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:12,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:12,462 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:12,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:12,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:12,466 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:12,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:12,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:12,494 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:34 [2021-07-09 17:35:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186831324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:12,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:12,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:12,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400063676] [2021-07-09 17:35:12,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:12,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:12,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:12,568 INFO L87 Difference]: Start difference. First operand 1295 states and 4208 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:12,990 INFO L93 Difference]: Finished difference Result 1530 states and 4820 transitions. [2021-07-09 17:35:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:12,992 INFO L225 Difference]: With dead ends: 1530 [2021-07-09 17:35:12,992 INFO L226 Difference]: Without dead ends: 1453 [2021-07-09 17:35:12,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-07-09 17:35:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1288. [2021-07-09 17:35:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.247863247863248) internal successors, (4180), 1287 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4180 transitions. [2021-07-09 17:35:13,014 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4180 transitions. Word has length 24 [2021-07-09 17:35:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:13,014 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4180 transitions. [2021-07-09 17:35:13,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4180 transitions. [2021-07-09 17:35:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:13,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:13,016 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:13,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2898 [2021-07-09 17:35:13,219 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:13,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1576570104, now seen corresponding path program 366 times [2021-07-09 17:35:13,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:13,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324267733] [2021-07-09 17:35:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:13,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:13,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324267733] [2021-07-09 17:35:13,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324267733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607732086] [2021-07-09 17:35:13,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:13,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:13,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:13,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:35:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:13,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:13,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:13,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:13,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:13,585 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-07-09 17:35:13,643 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:13,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:13,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:13,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:13,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:13,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:13,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:13,739 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:13,744 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:13,749 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:13,754 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:13,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:13,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:13,819 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:75 [2021-07-09 17:35:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607732086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:13,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:13,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572704993] [2021-07-09 17:35:13,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:13,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:13,997 INFO L87 Difference]: Start difference. First operand 1288 states and 4180 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:14,735 INFO L93 Difference]: Finished difference Result 1534 states and 4849 transitions. [2021-07-09 17:35:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:14,738 INFO L225 Difference]: With dead ends: 1534 [2021-07-09 17:35:14,738 INFO L226 Difference]: Without dead ends: 1468 [2021-07-09 17:35:14,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 802.7ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-07-09 17:35:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1287. [2021-07-09 17:35:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 3.2472783825816487) internal successors, (4176), 1286 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4176 transitions. [2021-07-09 17:35:14,754 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4176 transitions. Word has length 24 [2021-07-09 17:35:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:14,754 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 4176 transitions. [2021-07-09 17:35:14,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4176 transitions. [2021-07-09 17:35:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:14,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:14,755 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:14,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2906,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:14,957 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1884625822, now seen corresponding path program 367 times [2021-07-09 17:35:14,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:14,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273572644] [2021-07-09 17:35:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:15,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:15,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273572644] [2021-07-09 17:35:15,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273572644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:15,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026255207] [2021-07-09 17:35:15,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:15,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:15,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:15,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:15,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:15,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:15,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:15,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:15,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:15,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:15,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:15,357 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:35:15,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:15,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:15,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:15,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:15,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:15,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:15,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:15,629 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.4 percent of original size [2021-07-09 17:35:15,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:15,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:15,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:15,634 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:15,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:15,638 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:15,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:15,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:35:15,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:15,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:15,707 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1351 vanished before elimination [2021-07-09 17:35:15,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:15,708 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:35:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:15,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026255207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:15,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:15,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:15,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402647399] [2021-07-09 17:35:15,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:15,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:15,794 INFO L87 Difference]: Start difference. First operand 1287 states and 4176 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:16,230 INFO L93 Difference]: Finished difference Result 1441 states and 4604 transitions. [2021-07-09 17:35:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:16,233 INFO L225 Difference]: With dead ends: 1441 [2021-07-09 17:35:16,233 INFO L226 Difference]: Without dead ends: 1388 [2021-07-09 17:35:16,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 536.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-07-09 17:35:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1290. [2021-07-09 17:35:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.247478665632273) internal successors, (4186), 1289 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4186 transitions. [2021-07-09 17:35:16,249 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4186 transitions. Word has length 24 [2021-07-09 17:35:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:16,249 INFO L482 AbstractCegarLoop]: Abstraction has 1290 states and 4186 transitions. [2021-07-09 17:35:16,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4186 transitions. [2021-07-09 17:35:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:16,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:16,251 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:16,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2916,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:16,453 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 442011008, now seen corresponding path program 368 times [2021-07-09 17:35:16,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:16,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26637470] [2021-07-09 17:35:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:16,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26637470] [2021-07-09 17:35:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26637470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375091588] [2021-07-09 17:35:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:16,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:16,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:16,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:16,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:16,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:16,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:16,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:16,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:35:16,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:16,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:16,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:16,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:16,950 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:16,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:16,955 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:17,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:17,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:17,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:17,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:17,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:17,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:17,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:17,078 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:17,082 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:17,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:17,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:17,146 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:35:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:17,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375091588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:17,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:17,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:17,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760729522] [2021-07-09 17:35:17,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:17,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:17,279 INFO L87 Difference]: Start difference. First operand 1290 states and 4186 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:17,947 INFO L93 Difference]: Finished difference Result 1539 states and 4816 transitions. [2021-07-09 17:35:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:17,951 INFO L225 Difference]: With dead ends: 1539 [2021-07-09 17:35:17,951 INFO L226 Difference]: Without dead ends: 1477 [2021-07-09 17:35:17,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 794.5ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-07-09 17:35:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1293. [2021-07-09 17:35:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.2476780185758516) internal successors, (4196), 1292 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4196 transitions. [2021-07-09 17:35:17,968 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4196 transitions. Word has length 24 [2021-07-09 17:35:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:17,968 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4196 transitions. [2021-07-09 17:35:17,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4196 transitions. [2021-07-09 17:35:17,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:17,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:17,970 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:18,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:18,170 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:18,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:18,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2043570622, now seen corresponding path program 369 times [2021-07-09 17:35:18,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:18,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750321079] [2021-07-09 17:35:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:18,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:18,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750321079] [2021-07-09 17:35:18,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750321079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:18,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926276620] [2021-07-09 17:35:18,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:18,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:18,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:18,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:18,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:18,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:18,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:18,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:18,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:35:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:18,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:18,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:18,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:18,595 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:18,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:18,600 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:18,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:18,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:18,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:18,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:18,718 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:18,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:18,722 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:18,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:18,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:18,791 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:35:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:18,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926276620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:18,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:18,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:18,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852257810] [2021-07-09 17:35:18,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:18,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:18,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:18,927 INFO L87 Difference]: Start difference. First operand 1293 states and 4196 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:19,494 INFO L93 Difference]: Finished difference Result 1445 states and 4596 transitions. [2021-07-09 17:35:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:19,497 INFO L225 Difference]: With dead ends: 1445 [2021-07-09 17:35:19,497 INFO L226 Difference]: Without dead ends: 1388 [2021-07-09 17:35:19,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 613.0ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-07-09 17:35:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1287. [2021-07-09 17:35:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 3.2472783825816487) internal successors, (4176), 1286 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4176 transitions. [2021-07-09 17:35:19,512 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4176 transitions. Word has length 24 [2021-07-09 17:35:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:19,513 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 4176 transitions. [2021-07-09 17:35:19,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4176 transitions. [2021-07-09 17:35:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:19,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:19,514 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:19,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2932,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:19,715 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1663972782, now seen corresponding path program 370 times [2021-07-09 17:35:19,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:19,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354508536] [2021-07-09 17:35:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:19,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:19,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354508536] [2021-07-09 17:35:19,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354508536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:19,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145597466] [2021-07-09 17:35:19,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:19,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:19,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:19,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:20,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:20,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:20,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:20,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:20,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:20,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:20,081 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:35:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:20,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:20,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,310 INFO L628 ElimStorePlain]: treesize reduction 49, result has 41.0 percent of original size [2021-07-09 17:35:20,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:20,313 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:20,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:20,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,323 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-07-09 17:35:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:20,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145597466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:20,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:20,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163590214] [2021-07-09 17:35:20,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:20,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:20,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:20,362 INFO L87 Difference]: Start difference. First operand 1287 states and 4176 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:20,898 INFO L93 Difference]: Finished difference Result 1465 states and 4621 transitions. [2021-07-09 17:35:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:20,900 INFO L225 Difference]: With dead ends: 1465 [2021-07-09 17:35:20,900 INFO L226 Difference]: Without dead ends: 1379 [2021-07-09 17:35:20,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-07-09 17:35:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1305. [2021-07-09 17:35:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.2476993865030677) internal successors, (4235), 1304 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4235 transitions. [2021-07-09 17:35:20,915 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4235 transitions. Word has length 24 [2021-07-09 17:35:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:20,915 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 4235 transitions. [2021-07-09 17:35:20,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4235 transitions. [2021-07-09 17:35:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:20,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:20,917 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:21,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2942 [2021-07-09 17:35:21,118 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 893022698, now seen corresponding path program 371 times [2021-07-09 17:35:21,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:21,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378757578] [2021-07-09 17:35:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:21,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:21,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378757578] [2021-07-09 17:35:21,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378757578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:21,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387656239] [2021-07-09 17:35:21,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:21,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:21,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:21,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:21,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:21,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:21,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:21,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:21,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:21,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:21,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:21,438 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:35:21,596 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:21,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:21,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:21,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:21,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:21,636 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:21,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:21,642 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:21,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:21,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:21,668 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:27 [2021-07-09 17:35:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:21,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387656239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:21,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:21,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:35:21,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885456337] [2021-07-09 17:35:21,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:35:21,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:35:21,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:35:21,722 INFO L87 Difference]: Start difference. First operand 1305 states and 4235 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:22,205 INFO L93 Difference]: Finished difference Result 1487 states and 4685 transitions. [2021-07-09 17:35:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:22,208 INFO L225 Difference]: With dead ends: 1487 [2021-07-09 17:35:22,208 INFO L226 Difference]: Without dead ends: 1440 [2021-07-09 17:35:22,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-07-09 17:35:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1299. [2021-07-09 17:35:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.25115562403698) internal successors, (4220), 1298 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4220 transitions. [2021-07-09 17:35:22,223 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4220 transitions. Word has length 24 [2021-07-09 17:35:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:22,223 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4220 transitions. [2021-07-09 17:35:22,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4220 transitions. [2021-07-09 17:35:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:22,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:22,225 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:22,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:22,425 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1112318674, now seen corresponding path program 372 times [2021-07-09 17:35:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:22,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949300872] [2021-07-09 17:35:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:22,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949300872] [2021-07-09 17:35:22,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949300872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232560893] [2021-07-09 17:35:22,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:22,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:35:22,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:22,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:22,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:22,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:22,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:22,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:22,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:22,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:22,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:35:22,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:22,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:22,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:22,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:22,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:22,873 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:22,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:22,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:22,877 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:22,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:22,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:22,908 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-07-09 17:35:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:22,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232560893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:22,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:22,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517941368] [2021-07-09 17:35:22,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:22,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:22,958 INFO L87 Difference]: Start difference. First operand 1299 states and 4220 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:23,559 INFO L93 Difference]: Finished difference Result 1524 states and 4802 transitions. [2021-07-09 17:35:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:23,562 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 17:35:23,562 INFO L226 Difference]: Without dead ends: 1442 [2021-07-09 17:35:23,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:35:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-07-09 17:35:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1310. [2021-07-09 17:35:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.2521008403361344) internal successors, (4257), 1309 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4257 transitions. [2021-07-09 17:35:23,578 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4257 transitions. Word has length 24 [2021-07-09 17:35:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:23,578 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4257 transitions. [2021-07-09 17:35:23,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4257 transitions. [2021-07-09 17:35:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:23,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:23,580 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:23,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-07-09 17:35:23,780 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:23,780 INFO L82 PathProgramCache]: Analyzing trace with hash -921317806, now seen corresponding path program 373 times [2021-07-09 17:35:23,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:23,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518865299] [2021-07-09 17:35:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:23,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518865299] [2021-07-09 17:35:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518865299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861173409] [2021-07-09 17:35:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:23,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:24,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:24,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:24,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:24,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:24,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:24,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:24,107 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:35:24,283 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:24,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:24,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:24,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:24,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:24,323 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:24,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:24,327 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:24,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:24,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:24,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-07-09 17:35:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:24,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861173409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:24,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:24,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:35:24,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621446900] [2021-07-09 17:35:24,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:35:24,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:35:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:35:24,405 INFO L87 Difference]: Start difference. First operand 1310 states and 4257 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:24,817 INFO L93 Difference]: Finished difference Result 1517 states and 4835 transitions. [2021-07-09 17:35:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:24,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:24,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:24,820 INFO L225 Difference]: With dead ends: 1517 [2021-07-09 17:35:24,820 INFO L226 Difference]: Without dead ends: 1459 [2021-07-09 17:35:24,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-07-09 17:35:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1299. [2021-07-09 17:35:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.25115562403698) internal successors, (4220), 1298 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4220 transitions. [2021-07-09 17:35:24,836 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4220 transitions. Word has length 24 [2021-07-09 17:35:24,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:24,836 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4220 transitions. [2021-07-09 17:35:24,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4220 transitions. [2021-07-09 17:35:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:24,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:24,837 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:25,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-07-09 17:35:25,038 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1095209976, now seen corresponding path program 374 times [2021-07-09 17:35:25,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:25,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418397265] [2021-07-09 17:35:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:25,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:25,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418397265] [2021-07-09 17:35:25,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418397265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:25,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226718630] [2021-07-09 17:35:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:25,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:25,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:25,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:25,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:25,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:25,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:25,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:25,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:25,362 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:35:25,468 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-07-09 17:35:25,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:25,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:25,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:25,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:25,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:25,492 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:25,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:25,502 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:25,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:25,699 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-07-09 17:35:25,700 INFO L628 ElimStorePlain]: treesize reduction 169, result has 54.2 percent of original size [2021-07-09 17:35:25,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:25,705 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:25,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:25,710 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:25,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:25,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:25,715 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:25,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:25,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:35:25,796 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:96 [2021-07-09 17:35:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:25,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226718630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:25,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:25,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:25,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56500057] [2021-07-09 17:35:25,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:25,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:25,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:25,948 INFO L87 Difference]: Start difference. First operand 1299 states and 4220 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:26,563 INFO L93 Difference]: Finished difference Result 1663 states and 5194 transitions. [2021-07-09 17:35:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:26,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:26,566 INFO L225 Difference]: With dead ends: 1663 [2021-07-09 17:35:26,566 INFO L226 Difference]: Without dead ends: 1575 [2021-07-09 17:35:26,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-07-09 17:35:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1304. [2021-07-09 17:35:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.2586339217191096) internal successors, (4246), 1303 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 4246 transitions. [2021-07-09 17:35:26,582 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 4246 transitions. Word has length 24 [2021-07-09 17:35:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:26,582 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 4246 transitions. [2021-07-09 17:35:26,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 4246 transitions. [2021-07-09 17:35:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:26,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:26,584 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:26,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2971,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:26,784 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:26,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1975483512, now seen corresponding path program 375 times [2021-07-09 17:35:26,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:26,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304659702] [2021-07-09 17:35:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:27,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:27,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304659702] [2021-07-09 17:35:27,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304659702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:27,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333096979] [2021-07-09 17:35:27,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:27,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:27,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:27,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:27,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:27,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:27,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:27,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:35:27,182 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:27,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:27,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:27,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:27,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:27,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:27,274 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:27,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:27,279 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:27,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:27,284 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:27,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:27,288 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:27,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:27,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:27,349 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-07-09 17:35:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:27,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333096979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:27,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:27,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198636128] [2021-07-09 17:35:27,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:27,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:27,487 INFO L87 Difference]: Start difference. First operand 1304 states and 4246 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:27,966 INFO L93 Difference]: Finished difference Result 1658 states and 5198 transitions. [2021-07-09 17:35:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:27,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:27,969 INFO L225 Difference]: With dead ends: 1658 [2021-07-09 17:35:27,969 INFO L226 Difference]: Without dead ends: 1620 [2021-07-09 17:35:27,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-07-09 17:35:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1304. [2021-07-09 17:35:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.259401381427475) internal successors, (4247), 1303 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 4247 transitions. [2021-07-09 17:35:27,985 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 4247 transitions. Word has length 24 [2021-07-09 17:35:27,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:27,985 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 4247 transitions. [2021-07-09 17:35:27,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 4247 transitions. [2021-07-09 17:35:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:27,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:27,987 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:28,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2978 [2021-07-09 17:35:28,187 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2039059264, now seen corresponding path program 376 times [2021-07-09 17:35:28,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:28,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327133059] [2021-07-09 17:35:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:28,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:28,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327133059] [2021-07-09 17:35:28,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327133059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:28,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660265524] [2021-07-09 17:35:28,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:28,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:28,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:28,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:28,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:28,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:28,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:28,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:28,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-07-09 17:35:28,548 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-07-09 17:35:28,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:28,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:28,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:28,587 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:28,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:28,591 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:28,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:28,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:28,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-07-09 17:35:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:28,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660265524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:28,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:28,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:28,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164780961] [2021-07-09 17:35:28,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:28,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:28,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:28,712 INFO L87 Difference]: Start difference. First operand 1304 states and 4247 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:28,915 INFO L93 Difference]: Finished difference Result 1494 states and 4759 transitions. [2021-07-09 17:35:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:28,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:28,918 INFO L225 Difference]: With dead ends: 1494 [2021-07-09 17:35:28,918 INFO L226 Difference]: Without dead ends: 1456 [2021-07-09 17:35:28,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-07-09 17:35:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1296. [2021-07-09 17:35:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.2463320463320464) internal successors, (4204), 1295 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4204 transitions. [2021-07-09 17:35:28,933 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4204 transitions. Word has length 24 [2021-07-09 17:35:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:28,934 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4204 transitions. [2021-07-09 17:35:28,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4204 transitions. [2021-07-09 17:35:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:28,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:28,935 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:29,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2987,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:29,136 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:29,136 INFO L82 PathProgramCache]: Analyzing trace with hash -591855382, now seen corresponding path program 377 times [2021-07-09 17:35:29,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:29,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023423916] [2021-07-09 17:35:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:29,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:29,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023423916] [2021-07-09 17:35:29,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023423916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:29,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670583874] [2021-07-09 17:35:29,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:29,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:29,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:29,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:29,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:29,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:29,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-07-09 17:35:29,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:29,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:29,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:29,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:29,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:29,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:29,457 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:29,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:29,461 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:29,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:29,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:29,490 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-07-09 17:35:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:29,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670583874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:29,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:29,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:29,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720048739] [2021-07-09 17:35:29,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:29,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:29,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:29,562 INFO L87 Difference]: Start difference. First operand 1296 states and 4204 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:29,923 INFO L93 Difference]: Finished difference Result 1473 states and 4736 transitions. [2021-07-09 17:35:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:29,925 INFO L225 Difference]: With dead ends: 1473 [2021-07-09 17:35:29,925 INFO L226 Difference]: Without dead ends: 1427 [2021-07-09 17:35:29,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-09 17:35:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1293. [2021-07-09 17:35:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.2476780185758516) internal successors, (4196), 1292 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4196 transitions. [2021-07-09 17:35:29,941 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4196 transitions. Word has length 24 [2021-07-09 17:35:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:29,941 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4196 transitions. [2021-07-09 17:35:29,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4196 transitions. [2021-07-09 17:35:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:29,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:29,942 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:30,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-07-09 17:35:30,143 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash 39349120, now seen corresponding path program 378 times [2021-07-09 17:35:30,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:30,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414830145] [2021-07-09 17:35:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:30,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:30,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414830145] [2021-07-09 17:35:30,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414830145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:30,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687529553] [2021-07-09 17:35:30,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:30,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:30,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:30,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:30,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:30,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:30,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:30,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:30,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:30,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:35:30,555 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-07-09 17:35:30,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:30,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:30,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:30,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:30,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:30,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:30,635 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:30,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:30,640 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:30,645 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:30,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:30,650 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:30,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:30,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:30,715 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:193, output treesize:69 [2021-07-09 17:35:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:30,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687529553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:30,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:30,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439682316] [2021-07-09 17:35:30,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:30,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:30,859 INFO L87 Difference]: Start difference. First operand 1293 states and 4196 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:31,284 INFO L93 Difference]: Finished difference Result 1737 states and 5425 transitions. [2021-07-09 17:35:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:31,287 INFO L225 Difference]: With dead ends: 1737 [2021-07-09 17:35:31,288 INFO L226 Difference]: Without dead ends: 1644 [2021-07-09 17:35:31,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-09 17:35:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1304. [2021-07-09 17:35:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.256331542594014) internal successors, (4243), 1303 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 4243 transitions. [2021-07-09 17:35:31,305 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 4243 transitions. Word has length 24 [2021-07-09 17:35:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:31,305 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 4243 transitions. [2021-07-09 17:35:31,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 4243 transitions. [2021-07-09 17:35:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:31,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:31,306 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:31,507 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash 813553490, now seen corresponding path program 379 times [2021-07-09 17:35:31,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:31,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135446279] [2021-07-09 17:35:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:31,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:31,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135446279] [2021-07-09 17:35:31,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135446279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:31,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254550855] [2021-07-09 17:35:31,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:31,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:31,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:31,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:31,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:31,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:31,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:31,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:31,827 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-07-09 17:35:31,963 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-07-09 17:35:31,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:31,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:31,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:31,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:31,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:32,070 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-07-09 17:35:32,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:32,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:32,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:32,074 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:32,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:32,078 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:32,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:32,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:32,108 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:205, output treesize:34 [2021-07-09 17:35:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:32,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254550855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:32,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:32,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:32,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865335233] [2021-07-09 17:35:32,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:32,187 INFO L87 Difference]: Start difference. First operand 1304 states and 4243 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:32,641 INFO L93 Difference]: Finished difference Result 1679 states and 5263 transitions. [2021-07-09 17:35:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:32,643 INFO L225 Difference]: With dead ends: 1679 [2021-07-09 17:35:32,643 INFO L226 Difference]: Without dead ends: 1563 [2021-07-09 17:35:32,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-07-09 17:35:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1293. [2021-07-09 17:35:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.2476780185758516) internal successors, (4196), 1292 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4196 transitions. [2021-07-09 17:35:32,659 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4196 transitions. Word has length 24 [2021-07-09 17:35:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:32,659 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4196 transitions. [2021-07-09 17:35:32,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4196 transitions. [2021-07-09 17:35:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:32,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:32,661 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:32,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:32,861 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:32,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1073032214, now seen corresponding path program 380 times [2021-07-09 17:35:32,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:32,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808637037] [2021-07-09 17:35:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:33,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:33,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808637037] [2021-07-09 17:35:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808637037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:33,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543954545] [2021-07-09 17:35:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:33,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:33,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:33,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:33,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:33,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:33,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:33,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:33,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:33,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:33,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:33,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:35:33,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:33,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:33,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,514 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.4 percent of original size [2021-07-09 17:35:33,514 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:33,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:33,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:33,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:33,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:33,559 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:33,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:33,562 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:33,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:33,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:33,595 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:35:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:33,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543954545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:33,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:33,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:33,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052572468] [2021-07-09 17:35:33,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:33,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:33,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:33,676 INFO L87 Difference]: Start difference. First operand 1293 states and 4196 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:34,131 INFO L93 Difference]: Finished difference Result 1432 states and 4588 transitions. [2021-07-09 17:35:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:34,134 INFO L225 Difference]: With dead ends: 1432 [2021-07-09 17:35:34,134 INFO L226 Difference]: Without dead ends: 1379 [2021-07-09 17:35:34,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-07-09 17:35:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1299. [2021-07-09 17:35:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.2473035439137132) internal successors, (4215), 1298 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4215 transitions. [2021-07-09 17:35:34,149 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4215 transitions. Word has length 24 [2021-07-09 17:35:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:34,149 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4215 transitions. [2021-07-09 17:35:34,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4215 transitions. [2021-07-09 17:35:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:34,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:34,150 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:34,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:34,351 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:34,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1253604616, now seen corresponding path program 381 times [2021-07-09 17:35:34,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:34,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288838305] [2021-07-09 17:35:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:34,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:34,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288838305] [2021-07-09 17:35:34,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288838305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:34,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473822154] [2021-07-09 17:35:34,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:34,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:34,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:34,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:34,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:34,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:34,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:35:34,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:34,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:34,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:34,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:34,839 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:34,843 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:34,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:34,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:34,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:34,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:34,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:34,971 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:34,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:34,975 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:35,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:35,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:35,027 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:35:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:35,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473822154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:35,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:35,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:35,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090225014] [2021-07-09 17:35:35,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:35,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:35,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:35,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:35,189 INFO L87 Difference]: Start difference. First operand 1299 states and 4215 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:35,639 INFO L93 Difference]: Finished difference Result 1461 states and 4653 transitions. [2021-07-09 17:35:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:35,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:35,641 INFO L225 Difference]: With dead ends: 1461 [2021-07-09 17:35:35,641 INFO L226 Difference]: Without dead ends: 1395 [2021-07-09 17:35:35,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-07-09 17:35:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1296. [2021-07-09 17:35:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.247104247104247) internal successors, (4205), 1295 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4205 transitions. [2021-07-09 17:35:35,656 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4205 transitions. Word has length 24 [2021-07-09 17:35:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:35,657 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4205 transitions. [2021-07-09 17:35:35,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4205 transitions. [2021-07-09 17:35:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:35,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:35,658 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:35,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3022 [2021-07-09 17:35:35,859 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:35,859 INFO L82 PathProgramCache]: Analyzing trace with hash -772244488, now seen corresponding path program 382 times [2021-07-09 17:35:35,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:35,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605849332] [2021-07-09 17:35:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:36,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:36,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605849332] [2021-07-09 17:35:36,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605849332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060717215] [2021-07-09 17:35:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:36,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:36,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:36,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:36,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:36,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:36,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:36,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:36,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:36,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:36,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:36,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:35:36,432 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-07-09 17:35:36,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:36,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:36,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:36,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:36,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:36,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:36,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:36,508 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:36,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:36,512 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:36,517 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:36,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:36,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:36,522 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:36,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:36,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:36,581 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-07-09 17:35:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:36,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060717215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:36,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:36,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269450841] [2021-07-09 17:35:36,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:36,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:36,736 INFO L87 Difference]: Start difference. First operand 1296 states and 4205 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:37,298 INFO L93 Difference]: Finished difference Result 1648 states and 5175 transitions. [2021-07-09 17:35:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:37,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:37,302 INFO L225 Difference]: With dead ends: 1648 [2021-07-09 17:35:37,302 INFO L226 Difference]: Without dead ends: 1555 [2021-07-09 17:35:37,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-09 17:35:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1307. [2021-07-09 17:35:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.2557427258805514) internal successors, (4252), 1306 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4252 transitions. [2021-07-09 17:35:37,319 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4252 transitions. Word has length 24 [2021-07-09 17:35:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:37,319 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4252 transitions. [2021-07-09 17:35:37,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4252 transitions. [2021-07-09 17:35:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:37,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:37,321 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:37,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-07-09 17:35:37,521 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1959882, now seen corresponding path program 383 times [2021-07-09 17:35:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:37,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563096085] [2021-07-09 17:35:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:37,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:37,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563096085] [2021-07-09 17:35:37,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563096085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:37,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417125941] [2021-07-09 17:35:37,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:37,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:37,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:37,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:37,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:37,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:37,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:37,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:35:37,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:37,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:37,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:38,030 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:38,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:38,034 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:38,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:38,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:38,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-07-09 17:35:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:38,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417125941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:38,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:38,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:38,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838452165] [2021-07-09 17:35:38,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:38,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:38,158 INFO L87 Difference]: Start difference. First operand 1307 states and 4252 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:38,717 INFO L93 Difference]: Finished difference Result 1494 states and 4806 transitions. [2021-07-09 17:35:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:38,720 INFO L225 Difference]: With dead ends: 1494 [2021-07-09 17:35:38,720 INFO L226 Difference]: Without dead ends: 1448 [2021-07-09 17:35:38,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-07-09 17:35:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1294. [2021-07-09 17:35:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.2482598607888633) internal successors, (4200), 1293 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4200 transitions. [2021-07-09 17:35:38,736 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4200 transitions. Word has length 24 [2021-07-09 17:35:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:38,736 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 4200 transitions. [2021-07-09 17:35:38,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4200 transitions. [2021-07-09 17:35:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:38,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:38,737 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:38,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3042 [2021-07-09 17:35:38,938 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash 745828416, now seen corresponding path program 384 times [2021-07-09 17:35:38,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:38,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725853926] [2021-07-09 17:35:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:39,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:39,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725853926] [2021-07-09 17:35:39,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725853926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936879856] [2021-07-09 17:35:39,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:39,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:35:39,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:39,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:39,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:39,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:39,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:39,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-07-09 17:35:39,425 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1394], 1=[o_2, v_prenex_1395]} [2021-07-09 17:35:39,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:39,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:39,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:39,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:39,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:39,537 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:39,542 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:39,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:39,586 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:39,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:39,590 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:39,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:39,630 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-07-09 17:35:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:39,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936879856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:39,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:39,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424562478] [2021-07-09 17:35:39,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:39,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:39,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:39,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:39,734 INFO L87 Difference]: Start difference. First operand 1294 states and 4200 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,054 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-07-09 17:35:40,301 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2021-07-09 17:35:40,662 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-07-09 17:35:40,813 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2021-07-09 17:35:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:41,014 INFO L93 Difference]: Finished difference Result 1722 states and 5463 transitions. [2021-07-09 17:35:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:41,017 INFO L225 Difference]: With dead ends: 1722 [2021-07-09 17:35:41,017 INFO L226 Difference]: Without dead ends: 1648 [2021-07-09 17:35:41,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1300.8ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-07-09 17:35:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1297. [2021-07-09 17:35:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.247685185185185) internal successors, (4209), 1296 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4209 transitions. [2021-07-09 17:35:41,034 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4209 transitions. Word has length 24 [2021-07-09 17:35:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:41,034 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4209 transitions. [2021-07-09 17:35:41,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4209 transitions. [2021-07-09 17:35:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:41,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:41,036 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:41,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:41,253 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash -310029804, now seen corresponding path program 385 times [2021-07-09 17:35:41,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:41,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556959828] [2021-07-09 17:35:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:41,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556959828] [2021-07-09 17:35:41,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556959828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920148925] [2021-07-09 17:35:41,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:41,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:41,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:41,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:41,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:41,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:41,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:41,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:41,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-07-09 17:35:41,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:41,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:41,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,020 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.0 percent of original size [2021-07-09 17:35:42,020 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:42,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:42,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:42,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:42,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:42,064 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:42,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:42,068 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:42,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:42,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:42,101 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:35:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:42,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920148925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:42,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:42,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:42,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416326676] [2021-07-09 17:35:42,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:42,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:42,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:42,187 INFO L87 Difference]: Start difference. First operand 1297 states and 4209 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:42,618 INFO L93 Difference]: Finished difference Result 1521 states and 4883 transitions. [2021-07-09 17:35:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:42,621 INFO L225 Difference]: With dead ends: 1521 [2021-07-09 17:35:42,621 INFO L226 Difference]: Without dead ends: 1468 [2021-07-09 17:35:42,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-07-09 17:35:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1303. [2021-07-09 17:35:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.247311827956989) internal successors, (4228), 1302 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4228 transitions. [2021-07-09 17:35:42,637 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4228 transitions. Word has length 24 [2021-07-09 17:35:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:42,637 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4228 transitions. [2021-07-09 17:35:42,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4228 transitions. [2021-07-09 17:35:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:42,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:42,639 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:42,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-07-09 17:35:42,840 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:42,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2016607026, now seen corresponding path program 386 times [2021-07-09 17:35:42,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:42,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185113504] [2021-07-09 17:35:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:43,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:43,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185113504] [2021-07-09 17:35:43,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185113504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:43,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779045911] [2021-07-09 17:35:43,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:43,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:43,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:43,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:43,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:43,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:43,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:43,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:43,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-07-09 17:35:43,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:43,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:43,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:43,363 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:43,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:43,367 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:43,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:43,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:43,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:43,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:43,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:43,494 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:43,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:43,499 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:43,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:43,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:43,549 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-07-09 17:35:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:43,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779045911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:43,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:43,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:43,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608542089] [2021-07-09 17:35:43,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:43,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:43,706 INFO L87 Difference]: Start difference. First operand 1303 states and 4228 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:44,151 INFO L93 Difference]: Finished difference Result 1550 states and 4948 transitions. [2021-07-09 17:35:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:44,154 INFO L225 Difference]: With dead ends: 1550 [2021-07-09 17:35:44,154 INFO L226 Difference]: Without dead ends: 1484 [2021-07-09 17:35:44,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-07-09 17:35:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1300. [2021-07-09 17:35:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.2471131639722866) internal successors, (4218), 1299 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4218 transitions. [2021-07-09 17:35:44,170 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4218 transitions. Word has length 24 [2021-07-09 17:35:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:44,170 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4218 transitions. [2021-07-09 17:35:44,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4218 transitions. [2021-07-09 17:35:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:44,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:44,172 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:44,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-07-09 17:35:44,373 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash -9242078, now seen corresponding path program 387 times [2021-07-09 17:35:44,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:44,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999065846] [2021-07-09 17:35:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:44,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999065846] [2021-07-09 17:35:44,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999065846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389829136] [2021-07-09 17:35:44,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:44,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:44,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:44,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:44,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:44,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:44,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:44,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:44,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:44,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:44,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:44,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:44,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:35:44,974 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-07-09 17:35:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:44,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:44,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:44,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:44,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:45,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:45,052 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:45,057 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:45,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:45,062 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:45,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:45,066 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:45,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:45,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:45,116 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-07-09 17:35:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:45,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389829136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:45,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:45,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458166890] [2021-07-09 17:35:45,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:45,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:45,270 INFO L87 Difference]: Start difference. First operand 1300 states and 4218 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:45,976 INFO L93 Difference]: Finished difference Result 1737 states and 5470 transitions. [2021-07-09 17:35:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:45,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:45,980 INFO L225 Difference]: With dead ends: 1737 [2021-07-09 17:35:45,980 INFO L226 Difference]: Without dead ends: 1644 [2021-07-09 17:35:45,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 910.7ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-09 17:35:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1311. [2021-07-09 17:35:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.2557251908396947) internal successors, (4265), 1310 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4265 transitions. [2021-07-09 17:35:45,998 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4265 transitions. Word has length 24 [2021-07-09 17:35:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:45,998 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4265 transitions. [2021-07-09 17:35:45,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4265 transitions. [2021-07-09 17:35:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:45,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:45,999 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:46,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-07-09 17:35:46,200 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash 764962292, now seen corresponding path program 388 times [2021-07-09 17:35:46,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:46,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651538464] [2021-07-09 17:35:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:46,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651538464] [2021-07-09 17:35:46,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651538464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296144481] [2021-07-09 17:35:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:46,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:46,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:46,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:46,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:46,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:46,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:46,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:46,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:35:46,895 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-07-09 17:35:46,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:46,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:46,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:46,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:46,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,982 INFO L628 ElimStorePlain]: treesize reduction 89, result has 46.1 percent of original size [2021-07-09 17:35:46,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:46,987 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:46,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:46,991 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:47,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:47,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:47,018 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-07-09 17:35:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:47,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296144481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:47,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:47,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:47,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112871828] [2021-07-09 17:35:47,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:47,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:47,100 INFO L87 Difference]: Start difference. First operand 1311 states and 4265 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:47,613 INFO L93 Difference]: Finished difference Result 1583 states and 5075 transitions. [2021-07-09 17:35:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:47,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:47,616 INFO L225 Difference]: With dead ends: 1583 [2021-07-09 17:35:47,616 INFO L226 Difference]: Without dead ends: 1511 [2021-07-09 17:35:47,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-07-09 17:35:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1294. [2021-07-09 17:35:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.2482598607888633) internal successors, (4200), 1293 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4200 transitions. [2021-07-09 17:35:47,632 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4200 transitions. Word has length 24 [2021-07-09 17:35:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:47,632 INFO L482 AbstractCegarLoop]: Abstraction has 1294 states and 4200 transitions. [2021-07-09 17:35:47,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4200 transitions. [2021-07-09 17:35:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:47,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:47,634 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:47,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-07-09 17:35:47,834 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1588671568, now seen corresponding path program 389 times [2021-07-09 17:35:47,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:47,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902114992] [2021-07-09 17:35:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:47,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902114992] [2021-07-09 17:35:47,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902114992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899224572] [2021-07-09 17:35:47,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:48,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:48,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:48,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:48,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:48,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:48,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:48,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:48,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:61 [2021-07-09 17:35:48,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:48,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:48,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,271 INFO L628 ElimStorePlain]: treesize reduction 55, result has 38.2 percent of original size [2021-07-09 17:35:48,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:48,275 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:48,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:48,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-07-09 17:35:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:48,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899224572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:48,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:48,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567725225] [2021-07-09 17:35:48,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:48,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:48,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:48,321 INFO L87 Difference]: Start difference. First operand 1294 states and 4200 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:48,501 INFO L93 Difference]: Finished difference Result 1387 states and 4416 transitions. [2021-07-09 17:35:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:48,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:48,503 INFO L225 Difference]: With dead ends: 1387 [2021-07-09 17:35:48,503 INFO L226 Difference]: Without dead ends: 1328 [2021-07-09 17:35:48,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-07-09 17:35:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1295. [2021-07-09 17:35:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.2488408037094283) internal successors, (4204), 1294 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4204 transitions. [2021-07-09 17:35:48,518 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4204 transitions. Word has length 24 [2021-07-09 17:35:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:48,518 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4204 transitions. [2021-07-09 17:35:48,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4204 transitions. [2021-07-09 17:35:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:48,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:48,520 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:48,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-07-09 17:35:48,720 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash 968323912, now seen corresponding path program 390 times [2021-07-09 17:35:48,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:48,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184694393] [2021-07-09 17:35:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:48,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:48,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184694393] [2021-07-09 17:35:48,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184694393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452488405] [2021-07-09 17:35:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:48,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:49,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:49,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:49,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:49,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:49,039 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:49 [2021-07-09 17:35:49,093 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:35:49,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:49,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:49,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:49,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:49,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:49,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:49,173 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:49,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:49,178 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:49,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:49,183 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:49,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:49,188 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:49,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:49,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:49,243 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-07-09 17:35:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:49,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452488405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:49,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:49,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:49,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563345794] [2021-07-09 17:35:49,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:49,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:49,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:49,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:49,361 INFO L87 Difference]: Start difference. First operand 1295 states and 4204 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:49,808 INFO L93 Difference]: Finished difference Result 1451 states and 4623 transitions. [2021-07-09 17:35:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:49,811 INFO L225 Difference]: With dead ends: 1451 [2021-07-09 17:35:49,811 INFO L226 Difference]: Without dead ends: 1385 [2021-07-09 17:35:49,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-07-09 17:35:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1295. [2021-07-09 17:35:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.2488408037094283) internal successors, (4204), 1294 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4204 transitions. [2021-07-09 17:35:49,828 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4204 transitions. Word has length 24 [2021-07-09 17:35:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:49,828 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4204 transitions. [2021-07-09 17:35:49,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4204 transitions. [2021-07-09 17:35:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:49,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:49,829 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:50,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3113,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:50,030 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 430831056, now seen corresponding path program 391 times [2021-07-09 17:35:50,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:50,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189486927] [2021-07-09 17:35:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:50,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:50,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189486927] [2021-07-09 17:35:50,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189486927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:50,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313106565] [2021-07-09 17:35:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:50,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:50,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:50,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:50,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:50,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:50,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:39 [2021-07-09 17:35:50,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:50,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:50,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:50,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:50,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:35:50,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:50,467 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:50,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:50,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:35:50,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:50,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:50,498 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:97, output treesize:27 [2021-07-09 17:35:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313106565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:50,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:50,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:50,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711307279] [2021-07-09 17:35:50,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:50,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:50,575 INFO L87 Difference]: Start difference. First operand 1295 states and 4204 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:50,848 INFO L93 Difference]: Finished difference Result 1383 states and 4420 transitions. [2021-07-09 17:35:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:50,850 INFO L225 Difference]: With dead ends: 1383 [2021-07-09 17:35:50,850 INFO L226 Difference]: Without dead ends: 1344 [2021-07-09 17:35:50,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-09 17:35:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1295. [2021-07-09 17:35:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.2488408037094283) internal successors, (4204), 1294 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4204 transitions. [2021-07-09 17:35:50,865 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4204 transitions. Word has length 24 [2021-07-09 17:35:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:50,865 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4204 transitions. [2021-07-09 17:35:50,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4204 transitions. [2021-07-09 17:35:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:50,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:50,867 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:51,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3121 [2021-07-09 17:35:51,068 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:51,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1817593426, now seen corresponding path program 392 times [2021-07-09 17:35:51,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:51,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732210537] [2021-07-09 17:35:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:51,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:51,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732210537] [2021-07-09 17:35:51,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732210537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085093661] [2021-07-09 17:35:51,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:51,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:51,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:51,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:51,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:51,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:51,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:51,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:51,401 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:35:51,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:51,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:51,617 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:51,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-07-09 17:35:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:51,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085093661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:51,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:51,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104294598] [2021-07-09 17:35:51,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:51,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:51,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:51,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:51,662 INFO L87 Difference]: Start difference. First operand 1295 states and 4204 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:52,045 INFO L93 Difference]: Finished difference Result 1411 states and 4500 transitions. [2021-07-09 17:35:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:52,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:52,047 INFO L225 Difference]: With dead ends: 1411 [2021-07-09 17:35:52,047 INFO L226 Difference]: Without dead ends: 1380 [2021-07-09 17:35:52,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-07-09 17:35:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1310. [2021-07-09 17:35:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.248281130634072) internal successors, (4252), 1309 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4252 transitions. [2021-07-09 17:35:52,063 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4252 transitions. Word has length 24 [2021-07-09 17:35:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:52,063 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4252 transitions. [2021-07-09 17:35:52,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4252 transitions. [2021-07-09 17:35:52,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:52,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:52,065 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:52,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3125,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:52,281 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 79621610, now seen corresponding path program 393 times [2021-07-09 17:35:52,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:52,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239315761] [2021-07-09 17:35:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:52,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:52,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239315761] [2021-07-09 17:35:52,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239315761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531611730] [2021-07-09 17:35:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:52,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:52,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:52,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:52,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:52,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:52,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:52,592 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:35:52,709 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:35:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:52,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:52,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:52,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:52,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:52,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:52,785 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:52,789 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:52,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:52,794 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:52,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:52,798 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:52,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:52,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:52,856 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-07-09 17:35:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:52,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531611730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:52,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058780920] [2021-07-09 17:35:52,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:52,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:52,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:52,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:52,963 INFO L87 Difference]: Start difference. First operand 1310 states and 4252 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:53,587 INFO L93 Difference]: Finished difference Result 1645 states and 5090 transitions. [2021-07-09 17:35:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:53,590 INFO L225 Difference]: With dead ends: 1645 [2021-07-09 17:35:53,590 INFO L226 Difference]: Without dead ends: 1552 [2021-07-09 17:35:53,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-07-09 17:35:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1308. [2021-07-09 17:35:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.2494261667941853) internal successors, (4247), 1307 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4247 transitions. [2021-07-09 17:35:53,607 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4247 transitions. Word has length 24 [2021-07-09 17:35:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:53,607 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 4247 transitions. [2021-07-09 17:35:53,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4247 transitions. [2021-07-09 17:35:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:53,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:53,609 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:53,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3131 [2021-07-09 17:35:53,809 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:53,809 INFO L82 PathProgramCache]: Analyzing trace with hash -414132176, now seen corresponding path program 394 times [2021-07-09 17:35:53,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:53,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586014038] [2021-07-09 17:35:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:53,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:53,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586014038] [2021-07-09 17:35:53,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586014038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:53,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510913911] [2021-07-09 17:35:53,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:53,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:53,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:53,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:53,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:54,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:54,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:54,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:54,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:54,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:54,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:54,120 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:35:54,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:54,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:54,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:54,295 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:54,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:54,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-07-09 17:35:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:54,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510913911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:54,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:35:54,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43771760] [2021-07-09 17:35:54,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:35:54,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:54,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:35:54,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:35:54,333 INFO L87 Difference]: Start difference. First operand 1308 states and 4247 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:54,582 INFO L93 Difference]: Finished difference Result 1435 states and 4560 transitions. [2021-07-09 17:35:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:54,585 INFO L225 Difference]: With dead ends: 1435 [2021-07-09 17:35:54,585 INFO L226 Difference]: Without dead ends: 1404 [2021-07-09 17:35:54,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-07-09 17:35:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1303. [2021-07-09 17:35:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.2534562211981566) internal successors, (4236), 1302 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4236 transitions. [2021-07-09 17:35:54,601 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4236 transitions. Word has length 24 [2021-07-09 17:35:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:54,601 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4236 transitions. [2021-07-09 17:35:54,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4236 transitions. [2021-07-09 17:35:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:54,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:54,602 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:54,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3141,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:54,803 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1734718894, now seen corresponding path program 395 times [2021-07-09 17:35:54,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:54,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698863221] [2021-07-09 17:35:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:54,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:54,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698863221] [2021-07-09 17:35:54,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698863221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824983873] [2021-07-09 17:35:54,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:54,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:35:54,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:54,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:54,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:55,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:55,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:55,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:55,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:55,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:101 [2021-07-09 17:35:55,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:55,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:55,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:55,151 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:55,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:55,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:55,188 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:55,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:55,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:55,204 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:61, output treesize:31 [2021-07-09 17:35:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:55,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824983873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:55,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:55,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:55,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374695221] [2021-07-09 17:35:55,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:55,269 INFO L87 Difference]: Start difference. First operand 1303 states and 4236 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:55,572 INFO L93 Difference]: Finished difference Result 1533 states and 4830 transitions. [2021-07-09 17:35:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:55,575 INFO L225 Difference]: With dead ends: 1533 [2021-07-09 17:35:55,575 INFO L226 Difference]: Without dead ends: 1456 [2021-07-09 17:35:55,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-07-09 17:35:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1296. [2021-07-09 17:35:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.2494208494208494) internal successors, (4208), 1295 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4208 transitions. [2021-07-09 17:35:55,591 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4208 transitions. Word has length 24 [2021-07-09 17:35:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:55,591 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4208 transitions. [2021-07-09 17:35:55,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4208 transitions. [2021-07-09 17:35:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:55,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:55,593 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:55,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3147,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:55,794 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:55,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1908611064, now seen corresponding path program 396 times [2021-07-09 17:35:55,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:55,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734333544] [2021-07-09 17:35:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:55,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:55,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734333544] [2021-07-09 17:35:55,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734333544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:55,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211111816] [2021-07-09 17:35:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:55,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:55,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:35:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:56,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:56,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:56,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:56,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:35:56,130 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:35:56,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:56,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:56,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:56,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:56,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:56,213 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:56,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:56,217 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:56,222 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:56,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:56,226 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:56,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:56,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:56,284 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-07-09 17:35:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:56,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211111816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:56,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:56,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448500012] [2021-07-09 17:35:56,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:56,432 INFO L87 Difference]: Start difference. First operand 1296 states and 4208 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:57,131 INFO L93 Difference]: Finished difference Result 1577 states and 4938 transitions. [2021-07-09 17:35:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:57,133 INFO L225 Difference]: With dead ends: 1577 [2021-07-09 17:35:57,133 INFO L226 Difference]: Without dead ends: 1489 [2021-07-09 17:35:57,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 733.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-07-09 17:35:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1301. [2021-07-09 17:35:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.256923076923077) internal successors, (4234), 1300 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4234 transitions. [2021-07-09 17:35:57,149 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4234 transitions. Word has length 24 [2021-07-09 17:35:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:57,149 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4234 transitions. [2021-07-09 17:35:57,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4234 transitions. [2021-07-09 17:35:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:57,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:57,150 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:57,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-07-09 17:35:57,351 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:57,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1506082696, now seen corresponding path program 397 times [2021-07-09 17:35:57,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:57,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011977690] [2021-07-09 17:35:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:57,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:57,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011977690] [2021-07-09 17:35:57,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011977690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:57,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705643653] [2021-07-09 17:35:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:57,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:57,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:57,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:57,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:57,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:57,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:57,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:57,672 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-07-09 17:35:57,780 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-07-09 17:35:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:57,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:57,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:57,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:57,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:57,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:57,860 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:57,865 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:57,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:57,870 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:57,874 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:57,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:57,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:57,932 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-07-09 17:35:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:35:58,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705643653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:58,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:35:58,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702755939] [2021-07-09 17:35:58,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:35:58,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:35:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:35:58,039 INFO L87 Difference]: Start difference. First operand 1301 states and 4234 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:58,326 INFO L93 Difference]: Finished difference Result 1487 states and 4732 transitions. [2021-07-09 17:35:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:58,329 INFO L225 Difference]: With dead ends: 1487 [2021-07-09 17:35:58,329 INFO L226 Difference]: Without dead ends: 1468 [2021-07-09 17:35:58,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-07-09 17:35:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1296. [2021-07-09 17:35:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.2494208494208494) internal successors, (4208), 1295 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4208 transitions. [2021-07-09 17:35:58,345 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4208 transitions. Word has length 24 [2021-07-09 17:35:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:58,345 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4208 transitions. [2021-07-09 17:35:58,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4208 transitions. [2021-07-09 17:35:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:58,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:58,346 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:58,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3164 [2021-07-09 17:35:58,547 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1074839694, now seen corresponding path program 398 times [2021-07-09 17:35:58,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:58,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520274192] [2021-07-09 17:35:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:58,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:58,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520274192] [2021-07-09 17:35:58,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520274192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087442308] [2021-07-09 17:35:58,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:58,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:58,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:58,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:58,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:58,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:58,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:58,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:58,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-07-09 17:35:58,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:58,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:58,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:58,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:58,985 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:58,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:58,989 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:59,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:59,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:59,014 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-07-09 17:35:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:59,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087442308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:59,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:35:59,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941894525] [2021-07-09 17:35:59,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:35:59,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:59,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:35:59,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:35:59,066 INFO L87 Difference]: Start difference. First operand 1296 states and 4208 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:59,303 INFO L93 Difference]: Finished difference Result 1389 states and 4441 transitions. [2021-07-09 17:35:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:59,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:35:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:59,305 INFO L225 Difference]: With dead ends: 1389 [2021-07-09 17:35:59,305 INFO L226 Difference]: Without dead ends: 1350 [2021-07-09 17:35:59,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-09 17:35:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1299. [2021-07-09 17:35:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.2496147919876734) internal successors, (4218), 1298 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4218 transitions. [2021-07-09 17:35:59,319 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4218 transitions. Word has length 24 [2021-07-09 17:35:59,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:59,319 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4218 transitions. [2021-07-09 17:35:59,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4218 transitions. [2021-07-09 17:35:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:35:59,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:59,321 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:59,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3172 [2021-07-09 17:35:59,521 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:59,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1251797136, now seen corresponding path program 399 times [2021-07-09 17:35:59,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:59,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210798735] [2021-07-09 17:35:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:35:59,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:59,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210798735] [2021-07-09 17:35:59,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210798735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715902096] [2021-07-09 17:35:59,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:59,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:35:59,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:59,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:59,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:59,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:59,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:59,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:35:59,803 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-07-09 17:35:59,879 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:35:59,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:59,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:59,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:59,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:59,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:59,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:59,963 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:59,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:35:59,968 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:59,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:59,973 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:59,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:35:59,978 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:00,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:00,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:00,039 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-07-09 17:36:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:00,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715902096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:00,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:00,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610698517] [2021-07-09 17:36:00,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:00,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:00,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:00,150 INFO L87 Difference]: Start difference. First operand 1299 states and 4218 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:00,473 INFO L93 Difference]: Finished difference Result 1471 states and 4674 transitions. [2021-07-09 17:36:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:00,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:00,476 INFO L225 Difference]: With dead ends: 1471 [2021-07-09 17:36:00,476 INFO L226 Difference]: Without dead ends: 1424 [2021-07-09 17:36:00,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-07-09 17:36:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1304. [2021-07-09 17:36:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.257099002302379) internal successors, (4244), 1303 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 4244 transitions. [2021-07-09 17:36:00,493 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 4244 transitions. Word has length 24 [2021-07-09 17:36:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:00,493 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 4244 transitions. [2021-07-09 17:36:00,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 4244 transitions. [2021-07-09 17:36:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:00,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:00,495 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:00,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:00,695 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:00,696 INFO L82 PathProgramCache]: Analyzing trace with hash 371523600, now seen corresponding path program 400 times [2021-07-09 17:36:00,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:00,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11753069] [2021-07-09 17:36:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:00,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:00,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11753069] [2021-07-09 17:36:00,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11753069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537705957] [2021-07-09 17:36:00,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:00,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:00,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:00,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:00,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:00,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:00,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:00,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:00,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:00,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:00,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:00,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:00,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:00,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:00,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:00,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-07-09 17:36:01,141 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-07-09 17:36:01,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:01,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:01,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:01,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:01,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:01,165 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:01,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:01,175 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:01,179 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,376 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-07-09 17:36:01,385 INFO L628 ElimStorePlain]: treesize reduction 157, result has 56.3 percent of original size [2021-07-09 17:36:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:01,391 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:01,396 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:01,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:01,401 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:01,406 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:01,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:01,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:36:01,485 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-07-09 17:36:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:01,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537705957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:01,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:01,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821262257] [2021-07-09 17:36:01,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:01,618 INFO L87 Difference]: Start difference. First operand 1304 states and 4244 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:02,050 INFO L93 Difference]: Finished difference Result 1666 states and 5181 transitions. [2021-07-09 17:36:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:02,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:02,053 INFO L225 Difference]: With dead ends: 1666 [2021-07-09 17:36:02,053 INFO L226 Difference]: Without dead ends: 1548 [2021-07-09 17:36:02,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-07-09 17:36:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1297. [2021-07-09 17:36:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.2507716049382718) internal successors, (4213), 1296 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4213 transitions. [2021-07-09 17:36:02,070 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4213 transitions. Word has length 24 [2021-07-09 17:36:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:02,070 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4213 transitions. [2021-07-09 17:36:02,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4213 transitions. [2021-07-09 17:36:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:02,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:02,071 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:02,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3188 [2021-07-09 17:36:02,272 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:02,272 INFO L82 PathProgramCache]: Analyzing trace with hash -854186654, now seen corresponding path program 401 times [2021-07-09 17:36:02,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:02,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103128490] [2021-07-09 17:36:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:02,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:02,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103128490] [2021-07-09 17:36:02,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103128490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393567764] [2021-07-09 17:36:02,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:02,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:02,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:02,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:02,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:02,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:02,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:02,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:02,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:02,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:02,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:02,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:02,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:02,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-07-09 17:36:02,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:02,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:11 [2021-07-09 17:36:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:02,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393567764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:02,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:02,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:02,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934851918] [2021-07-09 17:36:02,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:02,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:02,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:02,904 INFO L87 Difference]: Start difference. First operand 1297 states and 4213 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:03,281 INFO L93 Difference]: Finished difference Result 1417 states and 4525 transitions. [2021-07-09 17:36:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:03,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:03,283 INFO L225 Difference]: With dead ends: 1417 [2021-07-09 17:36:03,283 INFO L226 Difference]: Without dead ends: 1386 [2021-07-09 17:36:03,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-07-09 17:36:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1317. [2021-07-09 17:36:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.25) internal successors, (4277), 1316 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4277 transitions. [2021-07-09 17:36:03,299 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4277 transitions. Word has length 24 [2021-07-09 17:36:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:03,299 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 4277 transitions. [2021-07-09 17:36:03,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4277 transitions. [2021-07-09 17:36:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:03,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:03,300 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:03,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3204,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,501 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1702808826, now seen corresponding path program 402 times [2021-07-09 17:36:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:03,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704364685] [2021-07-09 17:36:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:03,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:03,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704364685] [2021-07-09 17:36:03,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704364685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:03,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311513825] [2021-07-09 17:36:03,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:03,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:03,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:03,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:03,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:03,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:03,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:03,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:03,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-07-09 17:36:03,924 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:36:03,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:03,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:03,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:03,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:03,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:03,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:03,997 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:03,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:04,001 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:04,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:04,006 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:04,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:04,010 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:04,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:04,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:04,057 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:169, output treesize:57 [2021-07-09 17:36:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:04,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311513825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:04,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086917062] [2021-07-09 17:36:04,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:04,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:04,157 INFO L87 Difference]: Start difference. First operand 1317 states and 4277 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:04,812 INFO L93 Difference]: Finished difference Result 1560 states and 4895 transitions. [2021-07-09 17:36:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:04,814 INFO L225 Difference]: With dead ends: 1560 [2021-07-09 17:36:04,814 INFO L226 Difference]: Without dead ends: 1472 [2021-07-09 17:36:04,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 627.4ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-07-09 17:36:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1309. [2021-07-09 17:36:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.2545871559633026) internal successors, (4257), 1308 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4257 transitions. [2021-07-09 17:36:04,830 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4257 transitions. Word has length 24 [2021-07-09 17:36:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:04,830 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4257 transitions. [2021-07-09 17:36:04,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4257 transitions. [2021-07-09 17:36:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:04,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:04,832 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:05,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-07-09 17:36:05,032 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:05,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1922104802, now seen corresponding path program 403 times [2021-07-09 17:36:05,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:05,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542882369] [2021-07-09 17:36:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:05,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542882369] [2021-07-09 17:36:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542882369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471602362] [2021-07-09 17:36:05,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:05,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:05,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:05,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:05,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:05,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:05,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:05,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:05,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:05,418 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:05,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:05,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:05,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,654 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:36:05,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:05,658 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:05,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:05,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,667 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-07-09 17:36:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:05,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471602362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:05,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:05,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828172173] [2021-07-09 17:36:05,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:05,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:05,705 INFO L87 Difference]: Start difference. First operand 1309 states and 4257 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:06,155 INFO L93 Difference]: Finished difference Result 1543 states and 4858 transitions. [2021-07-09 17:36:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:06,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:06,157 INFO L225 Difference]: With dead ends: 1543 [2021-07-09 17:36:06,157 INFO L226 Difference]: Without dead ends: 1461 [2021-07-09 17:36:06,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-07-09 17:36:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1320. [2021-07-09 17:36:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.255496588324488) internal successors, (4294), 1319 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4294 transitions. [2021-07-09 17:36:06,173 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4294 transitions. Word has length 24 [2021-07-09 17:36:06,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:06,173 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 4294 transitions. [2021-07-09 17:36:06,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4294 transitions. [2021-07-09 17:36:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:06,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:06,175 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:06,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-07-09 17:36:06,375 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash -111531678, now seen corresponding path program 404 times [2021-07-09 17:36:06,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:06,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051699785] [2021-07-09 17:36:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:06,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:06,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051699785] [2021-07-09 17:36:06,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051699785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561168720] [2021-07-09 17:36:06,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:06,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:06,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:06,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:06,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:06,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:06,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:06,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:06,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:06,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-07-09 17:36:06,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:06,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:06,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:06,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:06,883 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:06,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:06,887 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:06,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:06,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:06,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-07-09 17:36:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:06,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561168720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:06,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:06,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295208209] [2021-07-09 17:36:06,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:06,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:07,000 INFO L87 Difference]: Start difference. First operand 1320 states and 4294 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:07,678 INFO L93 Difference]: Finished difference Result 1577 states and 4975 transitions. [2021-07-09 17:36:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:07,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:07,681 INFO L225 Difference]: With dead ends: 1577 [2021-07-09 17:36:07,681 INFO L226 Difference]: Without dead ends: 1519 [2021-07-09 17:36:07,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-07-09 17:36:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1315. [2021-07-09 17:36:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1314 states have (on average 3.2579908675799087) internal successors, (4281), 1314 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 4281 transitions. [2021-07-09 17:36:07,698 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 4281 transitions. Word has length 24 [2021-07-09 17:36:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:07,699 INFO L482 AbstractCegarLoop]: Abstraction has 1315 states and 4281 transitions. [2021-07-09 17:36:07,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 4281 transitions. [2021-07-09 17:36:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:07,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:07,700 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:07,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3226 [2021-07-09 17:36:07,907 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:07,907 INFO L82 PathProgramCache]: Analyzing trace with hash -285423848, now seen corresponding path program 405 times [2021-07-09 17:36:07,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:07,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225313712] [2021-07-09 17:36:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:08,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225313712] [2021-07-09 17:36:08,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225313712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187807075] [2021-07-09 17:36:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:08,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:08,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:08,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:08,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:08,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:08,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:08,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-07-09 17:36:08,279 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:36:08,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:08,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:08,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:08,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:08,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:08,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:08,358 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:08,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:08,363 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:08,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:08,367 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:08,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:08,378 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:08,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:08,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:08,431 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:69 [2021-07-09 17:36:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:08,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187807075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:08,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:08,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209947539] [2021-07-09 17:36:08,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:08,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:08,575 INFO L87 Difference]: Start difference. First operand 1315 states and 4281 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:09,435 INFO L93 Difference]: Finished difference Result 1676 states and 5263 transitions. [2021-07-09 17:36:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:09,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:09,438 INFO L225 Difference]: With dead ends: 1676 [2021-07-09 17:36:09,438 INFO L226 Difference]: Without dead ends: 1588 [2021-07-09 17:36:09,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 812.4ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-07-09 17:36:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1323. [2021-07-09 17:36:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.2700453857791225) internal successors, (4323), 1322 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4323 transitions. [2021-07-09 17:36:09,455 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4323 transitions. Word has length 24 [2021-07-09 17:36:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:09,455 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4323 transitions. [2021-07-09 17:36:09,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4323 transitions. [2021-07-09 17:36:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:09,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:09,457 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:09,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:09,657 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1263045456, now seen corresponding path program 406 times [2021-07-09 17:36:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:09,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453893452] [2021-07-09 17:36:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:09,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:09,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453893452] [2021-07-09 17:36:09,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453893452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143189091] [2021-07-09 17:36:09,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:09,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:09,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:09,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:09,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:09,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:09,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:09,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:09,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:09,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:36:10,041 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:36:10,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:10,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:10,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:10,078 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:10,082 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:10,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:10,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:10,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:31 [2021-07-09 17:36:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:10,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143189091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:10,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:10,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408383084] [2021-07-09 17:36:10,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:10,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:10,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:10,194 INFO L87 Difference]: Start difference. First operand 1323 states and 4323 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:10,548 INFO L93 Difference]: Finished difference Result 1529 states and 4875 transitions. [2021-07-09 17:36:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:10,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:10,550 INFO L225 Difference]: With dead ends: 1529 [2021-07-09 17:36:10,551 INFO L226 Difference]: Without dead ends: 1464 [2021-07-09 17:36:10,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-07-09 17:36:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1314. [2021-07-09 17:36:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.255140898705255) internal successors, (4274), 1313 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4274 transitions. [2021-07-09 17:36:10,566 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4274 transitions. Word has length 24 [2021-07-09 17:36:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:10,566 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4274 transitions. [2021-07-09 17:36:10,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4274 transitions. [2021-07-09 17:36:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:10,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:10,568 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:10,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:10,768 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:10,769 INFO L82 PathProgramCache]: Analyzing trace with hash 217930746, now seen corresponding path program 407 times [2021-07-09 17:36:10,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:10,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997170097] [2021-07-09 17:36:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:10,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:10,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997170097] [2021-07-09 17:36:10,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997170097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55005974] [2021-07-09 17:36:10,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:10,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:10,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:10,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:10,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:11,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:11,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:11,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:11,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-07-09 17:36:11,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:11,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:11,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:11,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:11,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:11,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:11,124 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:11,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:11,128 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:11,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:11,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:11,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-07-09 17:36:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:11,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55005974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:11,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:11,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535258668] [2021-07-09 17:36:11,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:11,219 INFO L87 Difference]: Start difference. First operand 1314 states and 4274 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:11,587 INFO L93 Difference]: Finished difference Result 1484 states and 4783 transitions. [2021-07-09 17:36:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:11,590 INFO L225 Difference]: With dead ends: 1484 [2021-07-09 17:36:11,590 INFO L226 Difference]: Without dead ends: 1438 [2021-07-09 17:36:11,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-07-09 17:36:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1314. [2021-07-09 17:36:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.255140898705255) internal successors, (4274), 1313 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4274 transitions. [2021-07-09 17:36:11,613 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4274 transitions. Word has length 24 [2021-07-09 17:36:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:11,614 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4274 transitions. [2021-07-09 17:36:11,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4274 transitions. [2021-07-09 17:36:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:11,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:11,615 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:11,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3253,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:11,816 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:11,816 INFO L82 PathProgramCache]: Analyzing trace with hash 849135248, now seen corresponding path program 408 times [2021-07-09 17:36:11,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:11,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942552028] [2021-07-09 17:36:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:12,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:12,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942552028] [2021-07-09 17:36:12,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942552028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747990825] [2021-07-09 17:36:12,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:12,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:12,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:12,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:12,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:12,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:12,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:12,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:12,180 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:12,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:12,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:12,338 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:12,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:12,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:12,448 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:12,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:12,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:12,552 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:12,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:12,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:12,646 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:12,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:12,689 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:36:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:12,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747990825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:12,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60238428] [2021-07-09 17:36:12,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:12,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:12,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:12,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:12,839 INFO L87 Difference]: Start difference. First operand 1314 states and 4274 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:13,370 INFO L93 Difference]: Finished difference Result 1748 states and 5472 transitions. [2021-07-09 17:36:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:13,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:13,373 INFO L225 Difference]: With dead ends: 1748 [2021-07-09 17:36:13,373 INFO L226 Difference]: Without dead ends: 1655 [2021-07-09 17:36:13,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-07-09 17:36:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1325. [2021-07-09 17:36:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 3.263595166163142) internal successors, (4321), 1324 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4321 transitions. [2021-07-09 17:36:13,390 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4321 transitions. Word has length 24 [2021-07-09 17:36:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:13,390 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 4321 transitions. [2021-07-09 17:36:13,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4321 transitions. [2021-07-09 17:36:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:13,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:13,392 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:13,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:13,592 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:13,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:13,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1623339618, now seen corresponding path program 409 times [2021-07-09 17:36:13,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:13,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111985472] [2021-07-09 17:36:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:13,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:13,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111985472] [2021-07-09 17:36:13,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111985472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660137864] [2021-07-09 17:36:13,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:13,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:13,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:13,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:13,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:13,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:13,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:13,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:13,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:13,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:13,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:13,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:13,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:13,938 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:14,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:14,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:14,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,132 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-07-09 17:36:14,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:14,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:14,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:14,164 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:14,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:14,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:14,191 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:14,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:14,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:14,214 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-07-09 17:36:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660137864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:14,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:14,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604653363] [2021-07-09 17:36:14,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:14,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:14,294 INFO L87 Difference]: Start difference. First operand 1325 states and 4321 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:14,796 INFO L93 Difference]: Finished difference Result 1768 states and 5513 transitions. [2021-07-09 17:36:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:14,799 INFO L225 Difference]: With dead ends: 1768 [2021-07-09 17:36:14,799 INFO L226 Difference]: Without dead ends: 1634 [2021-07-09 17:36:14,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 563.3ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-07-09 17:36:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1314. [2021-07-09 17:36:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.255140898705255) internal successors, (4274), 1313 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4274 transitions. [2021-07-09 17:36:14,816 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4274 transitions. Word has length 24 [2021-07-09 17:36:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:14,816 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4274 transitions. [2021-07-09 17:36:14,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4274 transitions. [2021-07-09 17:36:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:14,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:14,817 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:15,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-07-09 17:36:15,018 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash -263246086, now seen corresponding path program 410 times [2021-07-09 17:36:15,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:15,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619661294] [2021-07-09 17:36:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:15,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:15,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619661294] [2021-07-09 17:36:15,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619661294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232540563] [2021-07-09 17:36:15,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:15,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:15,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:15,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:15,404 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:36:15,544 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:36:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:15,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:15,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:15,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:15,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:15,628 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:15,632 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:15,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:15,637 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:15,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:15,641 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:15,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:15,699 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:69 [2021-07-09 17:36:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:15,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232540563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:15,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10079117] [2021-07-09 17:36:15,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:15,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:15,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:15,809 INFO L87 Difference]: Start difference. First operand 1314 states and 4274 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:16,325 INFO L93 Difference]: Finished difference Result 1477 states and 4717 transitions. [2021-07-09 17:36:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:16,328 INFO L225 Difference]: With dead ends: 1477 [2021-07-09 17:36:16,328 INFO L226 Difference]: Without dead ends: 1407 [2021-07-09 17:36:16,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-07-09 17:36:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1320. [2021-07-09 17:36:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.2547384382107656) internal successors, (4293), 1319 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4293 transitions. [2021-07-09 17:36:16,343 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4293 transitions. Word has length 24 [2021-07-09 17:36:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:16,343 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 4293 transitions. [2021-07-09 17:36:16,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4293 transitions. [2021-07-09 17:36:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:16,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:16,345 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:16,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-07-09 17:36:16,545 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:16,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2063390744, now seen corresponding path program 411 times [2021-07-09 17:36:16,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:16,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212741630] [2021-07-09 17:36:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:16,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:16,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212741630] [2021-07-09 17:36:16,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212741630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084479301] [2021-07-09 17:36:16,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:16,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:16,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:16,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:16,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:16,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:16,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:16,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:16,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:16,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:16,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:16,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:16,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:36:16,999 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:36:17,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:17,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:17,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:17,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:17,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:17,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:17,088 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:17,092 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:17,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:17,097 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:17,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:17,102 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:17,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:17,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:17,164 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-07-09 17:36:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:17,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084479301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:17,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:17,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700502129] [2021-07-09 17:36:17,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:17,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:17,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:17,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:17,328 INFO L87 Difference]: Start difference. First operand 1320 states and 4293 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:17,720 INFO L93 Difference]: Finished difference Result 1489 states and 4745 transitions. [2021-07-09 17:36:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:17,723 INFO L225 Difference]: With dead ends: 1489 [2021-07-09 17:36:17,723 INFO L226 Difference]: Without dead ends: 1423 [2021-07-09 17:36:17,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-07-09 17:36:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1317. [2021-07-09 17:36:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.2545592705167175) internal successors, (4283), 1316 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4283 transitions. [2021-07-09 17:36:17,740 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4283 transitions. Word has length 24 [2021-07-09 17:36:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:17,740 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 4283 transitions. [2021-07-09 17:36:17,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4283 transitions. [2021-07-09 17:36:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:17,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:17,742 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:17,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-07-09 17:36:17,943 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash 37541640, now seen corresponding path program 412 times [2021-07-09 17:36:17,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:17,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247109026] [2021-07-09 17:36:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:18,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247109026] [2021-07-09 17:36:18,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247109026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038818199] [2021-07-09 17:36:18,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:18,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:18,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:18,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:18,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:18,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:18,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:18,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:18,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:18,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:18,312 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:18,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:18,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:18,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:18,539 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:18,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:18,593 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:18,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:18,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:18,706 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:18,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:18,755 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:18,801 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:18,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:18,844 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:36:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:18,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038818199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:18,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:18,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692702997] [2021-07-09 17:36:18,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:18,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:18,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:18,993 INFO L87 Difference]: Start difference. First operand 1317 states and 4283 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:19,520 INFO L93 Difference]: Finished difference Result 1662 states and 5230 transitions. [2021-07-09 17:36:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:19,524 INFO L225 Difference]: With dead ends: 1662 [2021-07-09 17:36:19,524 INFO L226 Difference]: Without dead ends: 1569 [2021-07-09 17:36:19,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 683.1ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-07-09 17:36:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1328. [2021-07-09 17:36:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.2629992464204975) internal successors, (4330), 1327 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4330 transitions. [2021-07-09 17:36:19,540 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4330 transitions. Word has length 24 [2021-07-09 17:36:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:19,540 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4330 transitions. [2021-07-09 17:36:19,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4330 transitions. [2021-07-09 17:36:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:19,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:19,542 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:19,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:19,742 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:19,743 INFO L82 PathProgramCache]: Analyzing trace with hash 811746010, now seen corresponding path program 413 times [2021-07-09 17:36:19,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:19,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357653506] [2021-07-09 17:36:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:20,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:20,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357653506] [2021-07-09 17:36:20,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357653506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610304471] [2021-07-09 17:36:20,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:20,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:20,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:20,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:20,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:20,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:20,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:20,135 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:36:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:20,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:20,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:20,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:20,231 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:20,235 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:20,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:20,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:20,257 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-07-09 17:36:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:20,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610304471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:20,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:20,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884806459] [2021-07-09 17:36:20,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:20,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:20,339 INFO L87 Difference]: Start difference. First operand 1328 states and 4330 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:20,919 INFO L93 Difference]: Finished difference Result 1508 states and 4861 transitions. [2021-07-09 17:36:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:20,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:20,922 INFO L225 Difference]: With dead ends: 1508 [2021-07-09 17:36:20,922 INFO L226 Difference]: Without dead ends: 1462 [2021-07-09 17:36:20,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 657.5ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-07-09 17:36:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1314. [2021-07-09 17:36:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.255140898705255) internal successors, (4274), 1313 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4274 transitions. [2021-07-09 17:36:20,938 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4274 transitions. Word has length 24 [2021-07-09 17:36:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:20,938 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4274 transitions. [2021-07-09 17:36:20,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4274 transitions. [2021-07-09 17:36:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:20,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:20,940 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:21,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,140 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:21,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1922390028, now seen corresponding path program 414 times [2021-07-09 17:36:21,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:21,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687687740] [2021-07-09 17:36:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:21,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:21,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687687740] [2021-07-09 17:36:21,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687687740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754438573] [2021-07-09 17:36:21,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:21,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:21,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:21,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:21,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-07-09 17:36:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:21,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:21,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:21,735 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:21,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:21,738 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:21,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:21,761 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:81, output treesize:25 [2021-07-09 17:36:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:21,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754438573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:21,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:21,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109503464] [2021-07-09 17:36:21,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:21,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:21,810 INFO L87 Difference]: Start difference. First operand 1314 states and 4274 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:22,738 INFO L93 Difference]: Finished difference Result 1600 states and 5070 transitions. [2021-07-09 17:36:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:36:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:22,741 INFO L225 Difference]: With dead ends: 1600 [2021-07-09 17:36:22,742 INFO L226 Difference]: Without dead ends: 1514 [2021-07-09 17:36:22,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:36:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-07-09 17:36:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1327. [2021-07-09 17:36:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.255656108597285) internal successors, (4317), 1326 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4317 transitions. [2021-07-09 17:36:22,758 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4317 transitions. Word has length 24 [2021-07-09 17:36:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:22,758 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4317 transitions. [2021-07-09 17:36:22,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4317 transitions. [2021-07-09 17:36:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:22,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:22,760 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:22,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3316 [2021-07-09 17:36:22,960 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash 634605452, now seen corresponding path program 415 times [2021-07-09 17:36:22,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:22,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213840888] [2021-07-09 17:36:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:23,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:23,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213840888] [2021-07-09 17:36:23,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213840888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690913906] [2021-07-09 17:36:23,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:23,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:23,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:23,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:23,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:23,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:23,376 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:23,522 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-07-09 17:36:23,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:23,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:23,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:23,557 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:23,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:23,561 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:23,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:23,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:27 [2021-07-09 17:36:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:23,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690913906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:23,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959006959] [2021-07-09 17:36:23,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:23,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:23,635 INFO L87 Difference]: Start difference. First operand 1327 states and 4317 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,879 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 17:36:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:24,250 INFO L93 Difference]: Finished difference Result 1593 states and 5019 transitions. [2021-07-09 17:36:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:24,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:24,253 INFO L225 Difference]: With dead ends: 1593 [2021-07-09 17:36:24,253 INFO L226 Difference]: Without dead ends: 1546 [2021-07-09 17:36:24,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-07-09 17:36:24,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1321. [2021-07-09 17:36:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 3.2590909090909093) internal successors, (4302), 1320 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 4302 transitions. [2021-07-09 17:36:24,270 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 4302 transitions. Word has length 24 [2021-07-09 17:36:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:24,270 INFO L482 AbstractCegarLoop]: Abstraction has 1321 states and 4302 transitions. [2021-07-09 17:36:24,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 4302 transitions. [2021-07-09 17:36:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:24,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:24,272 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:24,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:24,473 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:24,473 INFO L82 PathProgramCache]: Analyzing trace with hash 853901428, now seen corresponding path program 416 times [2021-07-09 17:36:24,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:24,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639438097] [2021-07-09 17:36:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:24,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:24,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639438097] [2021-07-09 17:36:24,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639438097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:24,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005928787] [2021-07-09 17:36:24,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:24,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:24,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:24,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:24,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:24,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:24,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:24,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:24,873 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:25,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:25,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:25,082 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:25,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:25,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:11 [2021-07-09 17:36:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:25,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005928787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:25,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:25,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030910734] [2021-07-09 17:36:25,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:25,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:25,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:25,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:25,128 INFO L87 Difference]: Start difference. First operand 1321 states and 4302 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,356 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 17:36:25,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:25,880 INFO L93 Difference]: Finished difference Result 1630 states and 5158 transitions. [2021-07-09 17:36:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:25,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:25,883 INFO L225 Difference]: With dead ends: 1630 [2021-07-09 17:36:25,883 INFO L226 Difference]: Without dead ends: 1592 [2021-07-09 17:36:25,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-09 17:36:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1325. [2021-07-09 17:36:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 3.2613293051359515) internal successors, (4318), 1324 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4318 transitions. [2021-07-09 17:36:25,901 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4318 transitions. Word has length 24 [2021-07-09 17:36:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:25,901 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 4318 transitions. [2021-07-09 17:36:25,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4318 transitions. [2021-07-09 17:36:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:25,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:25,903 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:26,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:26,103 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1179735052, now seen corresponding path program 417 times [2021-07-09 17:36:26,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:26,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70027783] [2021-07-09 17:36:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:26,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70027783] [2021-07-09 17:36:26,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70027783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844704089] [2021-07-09 17:36:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:26,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:26,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:26,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:26,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:26,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:26,434 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-07-09 17:36:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:26,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:26,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:26,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:26,562 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:26,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:26,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:26,565 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:26,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:26,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:26,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-07-09 17:36:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:26,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844704089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:26,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:26,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:26,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577090517] [2021-07-09 17:36:26,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:26,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:26,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:26,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:26,668 INFO L87 Difference]: Start difference. First operand 1325 states and 4318 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:27,576 INFO L93 Difference]: Finished difference Result 1881 states and 5796 transitions. [2021-07-09 17:36:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:36:27,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:27,579 INFO L225 Difference]: With dead ends: 1881 [2021-07-09 17:36:27,579 INFO L226 Difference]: Without dead ends: 1712 [2021-07-09 17:36:27,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 888.6ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:36:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-07-09 17:36:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1328. [2021-07-09 17:36:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.2629992464204975) internal successors, (4330), 1327 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4330 transitions. [2021-07-09 17:36:27,598 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4330 transitions. Word has length 24 [2021-07-09 17:36:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:27,598 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4330 transitions. [2021-07-09 17:36:27,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4330 transitions. [2021-07-09 17:36:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:27,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:27,600 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:27,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:27,800 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1353627222, now seen corresponding path program 418 times [2021-07-09 17:36:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:27,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579179106] [2021-07-09 17:36:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:27,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579179106] [2021-07-09 17:36:27,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579179106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087902067] [2021-07-09 17:36:27,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:27,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:27,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:28,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:28,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:28,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:28,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:28,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:28,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:28,197 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:28,302 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-07-09 17:36:28,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:28,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:28,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:28,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:28,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:28,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:28,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:28,342 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:28,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,526 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-09 17:36:28,527 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-07-09 17:36:28,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:28,532 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:28,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:28,537 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:28,542 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:28,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:28,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:36:28,613 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-07-09 17:36:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:28,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087902067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:28,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:28,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:28,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662984326] [2021-07-09 17:36:28,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:28,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:28,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:28,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:28,759 INFO L87 Difference]: Start difference. First operand 1328 states and 4330 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,993 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 17:36:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:29,497 INFO L93 Difference]: Finished difference Result 1771 states and 5548 transitions. [2021-07-09 17:36:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:29,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:29,500 INFO L225 Difference]: With dead ends: 1771 [2021-07-09 17:36:29,500 INFO L226 Difference]: Without dead ends: 1683 [2021-07-09 17:36:29,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-07-09 17:36:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1333. [2021-07-09 17:36:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.27027027027027) internal successors, (4356), 1332 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4356 transitions. [2021-07-09 17:36:29,517 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4356 transitions. Word has length 24 [2021-07-09 17:36:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:29,517 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4356 transitions. [2021-07-09 17:36:29,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4356 transitions. [2021-07-09 17:36:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:29,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:29,519 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:29,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-07-09 17:36:29,719 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2061066538, now seen corresponding path program 419 times [2021-07-09 17:36:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:29,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69849074] [2021-07-09 17:36:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:29,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:29,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69849074] [2021-07-09 17:36:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69849074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:29,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761642025] [2021-07-09 17:36:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:29,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:36:29,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:29,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:30,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:30,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:30,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:30,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:30,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:30,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:30,167 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:30,274 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-07-09 17:36:30,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:30,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:30,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:30,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:30,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:30,298 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:30,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:30,308 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:30,312 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,493 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-09 17:36:30,494 INFO L628 ElimStorePlain]: treesize reduction 174, result has 50.7 percent of original size [2021-07-09 17:36:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:30,499 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:30,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:30,503 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:30,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:30,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:36:30,575 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-07-09 17:36:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:36:30,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761642025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:30,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:30,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278230562] [2021-07-09 17:36:30,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:30,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:30,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:30,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:30,725 INFO L87 Difference]: Start difference. First operand 1333 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:30,992 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 17:36:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:31,686 INFO L93 Difference]: Finished difference Result 2089 states and 6418 transitions. [2021-07-09 17:36:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:36:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:31,690 INFO L225 Difference]: With dead ends: 2089 [2021-07-09 17:36:31,690 INFO L226 Difference]: Without dead ends: 1971 [2021-07-09 17:36:31,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 995.5ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:36:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-07-09 17:36:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1346. [2021-07-09 17:36:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.284014869888476) internal successors, (4417), 1345 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4417 transitions. [2021-07-09 17:36:31,709 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4417 transitions. Word has length 24 [2021-07-09 17:36:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:31,709 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 4417 transitions. [2021-07-09 17:36:31,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4417 transitions. [2021-07-09 17:36:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:31,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:31,711 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:31,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:31,911 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1997490786, now seen corresponding path program 420 times [2021-07-09 17:36:31,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:31,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856809809] [2021-07-09 17:36:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:32,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856809809] [2021-07-09 17:36:32,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856809809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081279101] [2021-07-09 17:36:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:32,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:32,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:32,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:32,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:32,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:32,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:32,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:32,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-07-09 17:36:32,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:32,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:32,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:32,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:32,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:32,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:32,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:32,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:32,287 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:32,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:32,291 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:32,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:32,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:32,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-07-09 17:36:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:32,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081279101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:32,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:32,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:32,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832130416] [2021-07-09 17:36:32,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:32,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:32,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:32,393 INFO L87 Difference]: Start difference. First operand 1346 states and 4417 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:32,805 INFO L93 Difference]: Finished difference Result 1654 states and 5332 transitions. [2021-07-09 17:36:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:32,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:32,808 INFO L225 Difference]: With dead ends: 1654 [2021-07-09 17:36:32,808 INFO L226 Difference]: Without dead ends: 1613 [2021-07-09 17:36:32,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-07-09 17:36:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1353. [2021-07-09 17:36:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.282544378698225) internal successors, (4438), 1352 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4438 transitions. [2021-07-09 17:36:32,826 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4438 transitions. Word has length 24 [2021-07-09 17:36:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:32,826 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4438 transitions. [2021-07-09 17:36:32,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4438 transitions. [2021-07-09 17:36:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:32,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:32,828 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:33,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:33,029 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash -850272628, now seen corresponding path program 421 times [2021-07-09 17:36:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:33,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43065808] [2021-07-09 17:36:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:33,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:33,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43065808] [2021-07-09 17:36:33,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43065808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:33,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018994514] [2021-07-09 17:36:33,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:33,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:33,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:33,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:33,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:33,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:33,365 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-07-09 17:36:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:33,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:33,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,552 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-07-09 17:36:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:33,556 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:33,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:33,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:33,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:33,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:33,637 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:33,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:33,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:33,666 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-07-09 17:36:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:33,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018994514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:33,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:33,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:33,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290230214] [2021-07-09 17:36:33,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:33,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:33,734 INFO L87 Difference]: Start difference. First operand 1353 states and 4438 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:34,053 INFO L93 Difference]: Finished difference Result 1624 states and 5244 transitions. [2021-07-09 17:36:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:34,056 INFO L225 Difference]: With dead ends: 1624 [2021-07-09 17:36:34,056 INFO L226 Difference]: Without dead ends: 1564 [2021-07-09 17:36:34,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-07-09 17:36:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1346. [2021-07-09 17:36:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.284014869888476) internal successors, (4417), 1345 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4417 transitions. [2021-07-09 17:36:34,073 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4417 transitions. Word has length 24 [2021-07-09 17:36:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:34,073 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 4417 transitions. [2021-07-09 17:36:34,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4417 transitions. [2021-07-09 17:36:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:34,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:34,074 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:34,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3371,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:34,275 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -219068126, now seen corresponding path program 422 times [2021-07-09 17:36:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:34,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526916079] [2021-07-09 17:36:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:34,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526916079] [2021-07-09 17:36:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526916079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032970596] [2021-07-09 17:36:34,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:34,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:34,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:34,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:34,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:34,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:34,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:34,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:34,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:34,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:34,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:34,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:34,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:34,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:34,789 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:34,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:34,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:34,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:34,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:34,908 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:34,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:34,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:34,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:35,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:35,059 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:35,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:35,106 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:35,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:35,148 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:36:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:35,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032970596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:35,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:35,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218401154] [2021-07-09 17:36:35,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:35,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:35,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:35,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:35,299 INFO L87 Difference]: Start difference. First operand 1346 states and 4417 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:35,914 INFO L93 Difference]: Finished difference Result 1862 states and 5869 transitions. [2021-07-09 17:36:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:35,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:35,917 INFO L225 Difference]: With dead ends: 1862 [2021-07-09 17:36:35,917 INFO L226 Difference]: Without dead ends: 1769 [2021-07-09 17:36:35,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 702.1ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-07-09 17:36:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1357. [2021-07-09 17:36:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 3.2920353982300883) internal successors, (4464), 1356 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 4464 transitions. [2021-07-09 17:36:35,935 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 4464 transitions. Word has length 24 [2021-07-09 17:36:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:35,935 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 4464 transitions. [2021-07-09 17:36:35,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 4464 transitions. [2021-07-09 17:36:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:35,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:35,937 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:36,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:36,138 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash 555136244, now seen corresponding path program 423 times [2021-07-09 17:36:36,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:36,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572381272] [2021-07-09 17:36:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:36,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:36,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572381272] [2021-07-09 17:36:36,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572381272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:36,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695431461] [2021-07-09 17:36:36,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:36,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:36,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:36,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:36,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:36,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:36,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:36,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:36,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:36,470 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:36,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:36,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:36,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:36,621 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:36,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:36,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:36,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:36,678 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:36,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:36,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:36,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:36:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:36,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695431461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:36,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:36,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:36,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188995102] [2021-07-09 17:36:36,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:36,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:36,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:36,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:36,786 INFO L87 Difference]: Start difference. First operand 1357 states and 4464 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:37,226 INFO L93 Difference]: Finished difference Result 1859 states and 5894 transitions. [2021-07-09 17:36:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:37,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:37,229 INFO L225 Difference]: With dead ends: 1859 [2021-07-09 17:36:37,229 INFO L226 Difference]: Without dead ends: 1770 [2021-07-09 17:36:37,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-07-09 17:36:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1360. [2021-07-09 17:36:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.295805739514349) internal successors, (4479), 1359 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4479 transitions. [2021-07-09 17:36:37,248 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4479 transitions. Word has length 24 [2021-07-09 17:36:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:37,248 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4479 transitions. [2021-07-09 17:36:37,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4479 transitions. [2021-07-09 17:36:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:37,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:37,250 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:37,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:37,450 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1270295952, now seen corresponding path program 424 times [2021-07-09 17:36:37,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:37,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586599001] [2021-07-09 17:36:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:37,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:37,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586599001] [2021-07-09 17:36:37,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586599001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273517541] [2021-07-09 17:36:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:37,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:37,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:37,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:37,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:37,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:37,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:37,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:37,746 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:36:37,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:37,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:37,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1515 vanished before elimination [2021-07-09 17:36:37,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:37,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:37,839 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:36:37,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:37,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:36:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:37,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273517541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:37,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:37,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180543585] [2021-07-09 17:36:37,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:37,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:37,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:37,944 INFO L87 Difference]: Start difference. First operand 1360 states and 4479 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:38,234 INFO L93 Difference]: Finished difference Result 1666 states and 5358 transitions. [2021-07-09 17:36:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:38,237 INFO L225 Difference]: With dead ends: 1666 [2021-07-09 17:36:38,237 INFO L226 Difference]: Without dead ends: 1628 [2021-07-09 17:36:38,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-07-09 17:36:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1349. [2021-07-09 17:36:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.28486646884273) internal successors, (4428), 1348 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4428 transitions. [2021-07-09 17:36:38,254 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4428 transitions. Word has length 24 [2021-07-09 17:36:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:38,254 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4428 transitions. [2021-07-09 17:36:38,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4428 transitions. [2021-07-09 17:36:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:38,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:38,256 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:38,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3396 [2021-07-09 17:36:38,456 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash 962500506, now seen corresponding path program 425 times [2021-07-09 17:36:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:38,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135667183] [2021-07-09 17:36:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:38,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:38,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135667183] [2021-07-09 17:36:38,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135667183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:38,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830252023] [2021-07-09 17:36:38,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:38,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:36:38,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:38,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:38,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:38,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:38,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:38,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:36:38,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:38,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:38,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1517 vanished before elimination [2021-07-09 17:36:38,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:38,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:38,805 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:36:38,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:38,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-07-09 17:36:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:38,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830252023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:38,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:38,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:38,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436866317] [2021-07-09 17:36:38,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:38,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:38,908 INFO L87 Difference]: Start difference. First operand 1349 states and 4428 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:39,112 INFO L93 Difference]: Finished difference Result 1694 states and 5413 transitions. [2021-07-09 17:36:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:39,115 INFO L225 Difference]: With dead ends: 1694 [2021-07-09 17:36:39,115 INFO L226 Difference]: Without dead ends: 1632 [2021-07-09 17:36:39,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-07-09 17:36:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1332. [2021-07-09 17:36:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.274229902329076) internal successors, (4358), 1331 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4358 transitions. [2021-07-09 17:36:39,133 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4358 transitions. Word has length 24 [2021-07-09 17:36:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:39,133 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4358 transitions. [2021-07-09 17:36:39,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4358 transitions. [2021-07-09 17:36:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:39,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:39,134 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:39,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3405,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,335 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:39,335 INFO L82 PathProgramCache]: Analyzing trace with hash -27430924, now seen corresponding path program 426 times [2021-07-09 17:36:39,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:39,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920557515] [2021-07-09 17:36:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:39,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920557515] [2021-07-09 17:36:39,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920557515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505611009] [2021-07-09 17:36:39,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:39,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:39,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:39,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:39,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:39,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:39,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:39,663 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:36:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:39,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:39,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:39,752 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:36:39,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:39,753 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-07-09 17:36:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:39,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505611009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:39,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:39,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970235787] [2021-07-09 17:36:39,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:39,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:39,842 INFO L87 Difference]: Start difference. First operand 1332 states and 4358 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:40,098 INFO L93 Difference]: Finished difference Result 1837 states and 5884 transitions. [2021-07-09 17:36:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:40,102 INFO L225 Difference]: With dead ends: 1837 [2021-07-09 17:36:40,102 INFO L226 Difference]: Without dead ends: 1775 [2021-07-09 17:36:40,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-07-09 17:36:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1332. [2021-07-09 17:36:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.274229902329076) internal successors, (4358), 1331 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4358 transitions. [2021-07-09 17:36:40,119 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4358 transitions. Word has length 24 [2021-07-09 17:36:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:40,119 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4358 transitions. [2021-07-09 17:36:40,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4358 transitions. [2021-07-09 17:36:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:40,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:40,120 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:40,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3413,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:40,321 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1757856568, now seen corresponding path program 427 times [2021-07-09 17:36:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:40,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210800965] [2021-07-09 17:36:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:40,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:40,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210800965] [2021-07-09 17:36:40,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210800965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:40,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277886413] [2021-07-09 17:36:40,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:40,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:40,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:40,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:40,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:40,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:40,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:40,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:40,648 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:36:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:40,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:40,883 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:40,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:40,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:40,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:40,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:40,993 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:41,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:41,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:41,096 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:41,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:41,145 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:41,191 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:41,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:41,234 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:36:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:41,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277886413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:41,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:41,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599756690] [2021-07-09 17:36:41,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:41,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:41,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:41,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:41,389 INFO L87 Difference]: Start difference. First operand 1332 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,250 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-07-09 17:36:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:42,395 INFO L93 Difference]: Finished difference Result 2238 states and 7062 transitions. [2021-07-09 17:36:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:42,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:42,399 INFO L225 Difference]: With dead ends: 2238 [2021-07-09 17:36:42,399 INFO L226 Difference]: Without dead ends: 2145 [2021-07-09 17:36:42,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-09 17:36:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1357. [2021-07-09 17:36:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 3.2868731563421827) internal successors, (4457), 1356 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 4457 transitions. [2021-07-09 17:36:42,420 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 4457 transitions. Word has length 24 [2021-07-09 17:36:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:42,420 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 4457 transitions. [2021-07-09 17:36:42,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 4457 transitions. [2021-07-09 17:36:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:42,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:42,422 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:42,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:42,622 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:42,622 INFO L82 PathProgramCache]: Analyzing trace with hash -983652198, now seen corresponding path program 428 times [2021-07-09 17:36:42,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:42,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276370112] [2021-07-09 17:36:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:42,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:42,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276370112] [2021-07-09 17:36:42,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276370112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882603547] [2021-07-09 17:36:42,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:42,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:42,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:42,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:42,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:42,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:42,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:42,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:42,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:42,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:42,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:36:43,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:43,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:43,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:43,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:43,164 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:43,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:43,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:43,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:43,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:43,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:43,212 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:43,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:43,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:43,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:36:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:43,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882603547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:43,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:43,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215367692] [2021-07-09 17:36:43,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:43,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:43,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:43,322 INFO L87 Difference]: Start difference. First operand 1357 states and 4457 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:44,139 INFO L93 Difference]: Finished difference Result 2219 states and 7043 transitions. [2021-07-09 17:36:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:44,144 INFO L225 Difference]: With dead ends: 2219 [2021-07-09 17:36:44,144 INFO L226 Difference]: Without dead ends: 2130 [2021-07-09 17:36:44,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 842.1ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-07-09 17:36:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1360. [2021-07-09 17:36:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.2906548933038997) internal successors, (4472), 1359 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4472 transitions. [2021-07-09 17:36:44,164 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4472 transitions. Word has length 24 [2021-07-09 17:36:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:44,164 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4472 transitions. [2021-07-09 17:36:44,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4472 transitions. [2021-07-09 17:36:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:44,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:44,165 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:44,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3429 [2021-07-09 17:36:44,366 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1145657428, now seen corresponding path program 429 times [2021-07-09 17:36:44,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:44,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242589318] [2021-07-09 17:36:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:44,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:44,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242589318] [2021-07-09 17:36:44,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242589318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16582539] [2021-07-09 17:36:44,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:44,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:44,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:44,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:44,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:44,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:44,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:44,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:44,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:36:44,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:44,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:44,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:44,890 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:44,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:44,914 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:44,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:44,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:36:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16582539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281307019] [2021-07-09 17:36:45,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:45,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:45,034 INFO L87 Difference]: Start difference. First operand 1360 states and 4472 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:45,663 INFO L93 Difference]: Finished difference Result 2381 states and 7597 transitions. [2021-07-09 17:36:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:45,667 INFO L225 Difference]: With dead ends: 2381 [2021-07-09 17:36:45,668 INFO L226 Difference]: Without dead ends: 2319 [2021-07-09 17:36:45,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-09 17:36:45,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1332. [2021-07-09 17:36:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.274229902329076) internal successors, (4358), 1331 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4358 transitions. [2021-07-09 17:36:45,691 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4358 transitions. Word has length 24 [2021-07-09 17:36:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:45,691 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4358 transitions. [2021-07-09 17:36:45,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4358 transitions. [2021-07-09 17:36:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:45,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:45,693 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:45,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:45,893 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash -721047532, now seen corresponding path program 430 times [2021-07-09 17:36:45,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:45,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860774039] [2021-07-09 17:36:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:46,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:46,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860774039] [2021-07-09 17:36:46,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860774039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:46,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594052744] [2021-07-09 17:36:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:46,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:46,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:46,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:46,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:36:46,586 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:36:46,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:46,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:46,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,697 INFO L628 ElimStorePlain]: treesize reduction 59, result has 65.5 percent of original size [2021-07-09 17:36:46,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:46,702 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:46,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:46,706 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:46,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:46,749 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:56 [2021-07-09 17:36:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:46,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594052744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:46,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:46,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:46,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28584842] [2021-07-09 17:36:46,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:46,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:46,835 INFO L87 Difference]: Start difference. First operand 1332 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:47,441 INFO L93 Difference]: Finished difference Result 1491 states and 4812 transitions. [2021-07-09 17:36:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:47,444 INFO L225 Difference]: With dead ends: 1491 [2021-07-09 17:36:47,444 INFO L226 Difference]: Without dead ends: 1438 [2021-07-09 17:36:47,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-07-09 17:36:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1344. [2021-07-09 17:36:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.272524199553239) internal successors, (4395), 1343 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4395 transitions. [2021-07-09 17:36:47,458 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4395 transitions. Word has length 24 [2021-07-09 17:36:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:47,458 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4395 transitions. [2021-07-09 17:36:47,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4395 transitions. [2021-07-09 17:36:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:47,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:47,460 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:47,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3447 [2021-07-09 17:36:47,660 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1605589298, now seen corresponding path program 431 times [2021-07-09 17:36:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729100631] [2021-07-09 17:36:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:47,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:47,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729100631] [2021-07-09 17:36:47,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729100631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471482010] [2021-07-09 17:36:47,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:47,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:47,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:47,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:47,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:47,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:47,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:48,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:48,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-07-09 17:36:48,094 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:36:48,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:48,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:48,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:48,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:48,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:48,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:48,179 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:48,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:48,184 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:48,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:48,188 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:48,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:48,193 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:48,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:48,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:48,256 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-07-09 17:36:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:48,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471482010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:48,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910578011] [2021-07-09 17:36:48,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:48,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:48,391 INFO L87 Difference]: Start difference. First operand 1344 states and 4395 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:49,337 INFO L93 Difference]: Finished difference Result 1607 states and 5139 transitions. [2021-07-09 17:36:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:49,340 INFO L225 Difference]: With dead ends: 1607 [2021-07-09 17:36:49,340 INFO L226 Difference]: Without dead ends: 1541 [2021-07-09 17:36:49,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:36:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-07-09 17:36:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1347. [2021-07-09 17:36:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 3.2726597325408617) internal successors, (4405), 1346 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 4405 transitions. [2021-07-09 17:36:49,363 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 4405 transitions. Word has length 24 [2021-07-09 17:36:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:49,363 INFO L482 AbstractCegarLoop]: Abstraction has 1347 states and 4405 transitions. [2021-07-09 17:36:49,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 4405 transitions. [2021-07-09 17:36:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:49,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:49,365 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:49,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3459,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:49,565 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash -738290948, now seen corresponding path program 432 times [2021-07-09 17:36:49,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:49,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37385202] [2021-07-09 17:36:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:49,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:49,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37385202] [2021-07-09 17:36:49,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37385202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:49,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622677330] [2021-07-09 17:36:49,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:49,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:49,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:49,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:36:49,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:49,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:49,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:49,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:49,937 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-07-09 17:36:50,011 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:36:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:50,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:50,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:50,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:50,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:50,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:50,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:50,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:50,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:50,100 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:50,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:50,105 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:50,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:50,110 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:50,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:50,115 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:50,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:50,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:50,179 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-07-09 17:36:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:50,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622677330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:50,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:50,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:50,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224438497] [2021-07-09 17:36:50,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:50,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:50,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:50,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:50,301 INFO L87 Difference]: Start difference. First operand 1347 states and 4405 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:50,807 INFO L93 Difference]: Finished difference Result 1548 states and 4927 transitions. [2021-07-09 17:36:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:50,809 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 17:36:50,810 INFO L226 Difference]: Without dead ends: 1517 [2021-07-09 17:36:50,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-07-09 17:36:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1346. [2021-07-09 17:36:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.2713754646840147) internal successors, (4400), 1345 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4400 transitions. [2021-07-09 17:36:50,825 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4400 transitions. Word has length 24 [2021-07-09 17:36:50,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:50,826 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 4400 transitions. [2021-07-09 17:36:50,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4400 transitions. [2021-07-09 17:36:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:50,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:50,827 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:51,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3469,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:51,028 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:51,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2056181010, now seen corresponding path program 433 times [2021-07-09 17:36:51,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:51,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957811943] [2021-07-09 17:36:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:51,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957811943] [2021-07-09 17:36:51,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957811943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63336925] [2021-07-09 17:36:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:51,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:51,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:51,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:51,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:51,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:51,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:51,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:51,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:51,524 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-07-09 17:36:51,705 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-07-09 17:36:51,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:51,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:51,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:51,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:51,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,818 INFO L628 ElimStorePlain]: treesize reduction 57, result has 65.2 percent of original size [2021-07-09 17:36:51,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:51,823 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:51,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:51,827 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:51,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:51,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:51,871 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-07-09 17:36:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:51,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63336925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:51,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:51,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:51,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961138676] [2021-07-09 17:36:51,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:51,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:51,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:51,959 INFO L87 Difference]: Start difference. First operand 1346 states and 4400 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:52,221 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-07-09 17:36:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:52,547 INFO L93 Difference]: Finished difference Result 1534 states and 4881 transitions. [2021-07-09 17:36:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:52,549 INFO L225 Difference]: With dead ends: 1534 [2021-07-09 17:36:52,550 INFO L226 Difference]: Without dead ends: 1457 [2021-07-09 17:36:52,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-07-09 17:36:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1342. [2021-07-09 17:36:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.273676360924683) internal successors, (4390), 1341 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4390 transitions. [2021-07-09 17:36:52,566 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4390 transitions. Word has length 24 [2021-07-09 17:36:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:52,566 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4390 transitions. [2021-07-09 17:36:52,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4390 transitions. [2021-07-09 17:36:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:52,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:52,568 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:52,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3481,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:52,768 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash -420259806, now seen corresponding path program 434 times [2021-07-09 17:36:52,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:52,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825233442] [2021-07-09 17:36:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:52,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:52,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825233442] [2021-07-09 17:36:52,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825233442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:52,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115019162] [2021-07-09 17:36:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:53,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:53,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:53,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:53,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:53,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:53,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:53,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:53,159 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:53,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:53,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:53,318 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:53,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:53,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:53,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:53,480 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:53,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:53,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:53,578 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:53,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:53,624 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:53,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:53,677 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:36:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:53,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115019162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:53,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:53,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:53,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329946414] [2021-07-09 17:36:53,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:53,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:53,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:53,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:53,834 INFO L87 Difference]: Start difference. First operand 1342 states and 4390 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:54,439 INFO L93 Difference]: Finished difference Result 1710 states and 5409 transitions. [2021-07-09 17:36:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:54,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:54,442 INFO L225 Difference]: With dead ends: 1710 [2021-07-09 17:36:54,442 INFO L226 Difference]: Without dead ends: 1617 [2021-07-09 17:36:54,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-07-09 17:36:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1353. [2021-07-09 17:36:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.2818047337278107) internal successors, (4437), 1352 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4437 transitions. [2021-07-09 17:36:54,459 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4437 transitions. Word has length 24 [2021-07-09 17:36:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:54,459 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4437 transitions. [2021-07-09 17:36:54,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4437 transitions. [2021-07-09 17:36:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:54,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:54,461 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:54,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3490 [2021-07-09 17:36:54,662 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:54,662 INFO L82 PathProgramCache]: Analyzing trace with hash 353944564, now seen corresponding path program 435 times [2021-07-09 17:36:54,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:54,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841258039] [2021-07-09 17:36:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:54,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841258039] [2021-07-09 17:36:54,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841258039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056410307] [2021-07-09 17:36:54,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:55,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:55,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:55,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:55,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:55,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:55,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:55,163 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-07-09 17:36:55,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:55,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:55,313 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:55,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:55,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:55,362 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:55,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:55,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:36:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:55,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056410307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:55,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:55,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570726521] [2021-07-09 17:36:55,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:55,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:55,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:55,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:55,472 INFO L87 Difference]: Start difference. First operand 1353 states and 4437 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:55,745 INFO L93 Difference]: Finished difference Result 1550 states and 4976 transitions. [2021-07-09 17:36:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:55,748 INFO L225 Difference]: With dead ends: 1550 [2021-07-09 17:36:55,748 INFO L226 Difference]: Without dead ends: 1488 [2021-07-09 17:36:55,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 518.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-07-09 17:36:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1340. [2021-07-09 17:36:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.2748319641523524) internal successors, (4385), 1339 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 4385 transitions. [2021-07-09 17:36:55,764 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 4385 transitions. Word has length 24 [2021-07-09 17:36:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:55,764 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 4385 transitions. [2021-07-09 17:36:55,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 4385 transitions. [2021-07-09 17:36:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:55,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:55,766 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:55,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:55,967 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1147454640, now seen corresponding path program 436 times [2021-07-09 17:36:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:55,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775078262] [2021-07-09 17:36:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:56,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:56,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775078262] [2021-07-09 17:36:56,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775078262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:56,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571862437] [2021-07-09 17:36:56,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:56,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:56,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:56,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:56,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:56,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:56,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:56,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:56,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:56,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:56,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:56,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:36:56,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:56,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:56,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,713 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-07-09 17:36:56,713 INFO L628 ElimStorePlain]: treesize reduction 162, result has 53.3 percent of original size [2021-07-09 17:36:56,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:36:56,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:56,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:56,794 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:56,799 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:56,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:56,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1571 vanished before elimination [2021-07-09 17:36:56,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:36:56,871 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:56,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1566 vanished before elimination [2021-07-09 17:36:56,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:56,942 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:57,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:57,009 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:57,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:57,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:36:57,073 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-07-09 17:36:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:57,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571862437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:57,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:57,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:57,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561961501] [2021-07-09 17:36:57,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:57,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:57,230 INFO L87 Difference]: Start difference. First operand 1340 states and 4385 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:57,536 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-07-09 17:36:58,279 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-07-09 17:36:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:58,520 INFO L93 Difference]: Finished difference Result 1937 states and 6135 transitions. [2021-07-09 17:36:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:36:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:58,523 INFO L225 Difference]: With dead ends: 1937 [2021-07-09 17:36:58,523 INFO L226 Difference]: Without dead ends: 1857 [2021-07-09 17:36:58,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1360.2ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:36:58,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-07-09 17:36:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1368. [2021-07-09 17:36:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.2874908558888074) internal successors, (4494), 1367 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4494 transitions. [2021-07-09 17:36:58,542 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4494 transitions. Word has length 24 [2021-07-09 17:36:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:58,542 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4494 transitions. [2021-07-09 17:36:58,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4494 transitions. [2021-07-09 17:36:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:36:58,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:58,543 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:58,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3508 [2021-07-09 17:36:58,744 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash 803632410, now seen corresponding path program 437 times [2021-07-09 17:36:58,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:58,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488495503] [2021-07-09 17:36:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:58,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488495503] [2021-07-09 17:36:58,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488495503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962039959] [2021-07-09 17:36:58,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:58,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:36:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:59,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:59,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:59,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:59,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:59,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:36:59,053 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:36:59,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:59,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:59,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:36:59,325 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:59,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:59,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:59,438 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:59,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:59,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:36:59,541 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:59,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:59,588 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:59,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:59,631 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:36:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:36:59,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962039959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:59,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:59,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:59,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322560248] [2021-07-09 17:36:59,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:59,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:59,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:59,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:59,750 INFO L87 Difference]: Start difference. First operand 1368 states and 4494 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,022 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-07-09 17:37:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:00,759 INFO L93 Difference]: Finished difference Result 2009 states and 6306 transitions. [2021-07-09 17:37:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:37:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:00,763 INFO L225 Difference]: With dead ends: 2009 [2021-07-09 17:37:00,763 INFO L226 Difference]: Without dead ends: 1947 [2021-07-09 17:37:00,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-07-09 17:37:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1373. [2021-07-09 17:37:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.2900874635568513) internal successors, (4514), 1372 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4514 transitions. [2021-07-09 17:37:00,783 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4514 transitions. Word has length 24 [2021-07-09 17:37:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:00,783 INFO L482 AbstractCegarLoop]: Abstraction has 1373 states and 4514 transitions. [2021-07-09 17:37:00,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4514 transitions. [2021-07-09 17:37:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:00,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:00,785 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:00,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3515 [2021-07-09 17:37:00,985 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash -373250270, now seen corresponding path program 438 times [2021-07-09 17:37:00,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:00,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593016843] [2021-07-09 17:37:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:01,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593016843] [2021-07-09 17:37:01,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593016843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156357246] [2021-07-09 17:37:01,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:01,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:01,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:37:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:01,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:01,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:01,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:01,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:01,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:01,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:01,347 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:37:01,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:01,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:01,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,609 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-07-09 17:37:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:01,613 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:01,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:01,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:01,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:01,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:01,669 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:01,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:01,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:01,692 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-07-09 17:37:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:01,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156357246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:01,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:01,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:37:01,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125368291] [2021-07-09 17:37:01,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:37:01,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:01,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:37:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:01,775 INFO L87 Difference]: Start difference. First operand 1373 states and 4514 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:03,122 INFO L93 Difference]: Finished difference Result 2196 states and 6906 transitions. [2021-07-09 17:37:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:37:03,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:03,126 INFO L225 Difference]: With dead ends: 2196 [2021-07-09 17:37:03,126 INFO L226 Difference]: Without dead ends: 2053 [2021-07-09 17:37:03,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1412.2ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-07-09 17:37:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1377. [2021-07-09 17:37:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 3.2943313953488373) internal successors, (4533), 1376 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 4533 transitions. [2021-07-09 17:37:03,147 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 4533 transitions. Word has length 24 [2021-07-09 17:37:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:03,148 INFO L482 AbstractCegarLoop]: Abstraction has 1377 states and 4533 transitions. [2021-07-09 17:37:03,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 4533 transitions. [2021-07-09 17:37:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:03,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:03,150 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:03,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:03,351 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash -535255500, now seen corresponding path program 439 times [2021-07-09 17:37:03,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:03,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578851077] [2021-07-09 17:37:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:03,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:03,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578851077] [2021-07-09 17:37:03,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578851077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:03,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162578750] [2021-07-09 17:37:03,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:37:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:03,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:03,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:03,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:03,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:03,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:03,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:03,697 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-07-09 17:37:03,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:03,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:03,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,961 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-07-09 17:37:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:03,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:03,994 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:04,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:04,021 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:04,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:04,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:04,044 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-07-09 17:37:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:04,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162578750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:04,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:04,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:37:04,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629118004] [2021-07-09 17:37:04,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:37:04,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:37:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:04,126 INFO L87 Difference]: Start difference. First operand 1377 states and 4533 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:05,269 INFO L93 Difference]: Finished difference Result 2132 states and 6686 transitions. [2021-07-09 17:37:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:37:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:05,273 INFO L225 Difference]: With dead ends: 2132 [2021-07-09 17:37:05,273 INFO L226 Difference]: Without dead ends: 2016 [2021-07-09 17:37:05,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1129.3ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-07-09 17:37:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1352. [2021-07-09 17:37:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.2857142857142856) internal successors, (4439), 1351 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4439 transitions. [2021-07-09 17:37:05,292 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4439 transitions. Word has length 24 [2021-07-09 17:37:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:05,293 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4439 transitions. [2021-07-09 17:37:05,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4439 transitions. [2021-07-09 17:37:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:05,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:05,294 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:05,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:05,495 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:05,495 INFO L82 PathProgramCache]: Analyzing trace with hash -561114522, now seen corresponding path program 440 times [2021-07-09 17:37:05,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:05,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473516829] [2021-07-09 17:37:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:05,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:05,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473516829] [2021-07-09 17:37:05,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473516829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:05,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369204988] [2021-07-09 17:37:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:05,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:05,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:05,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:05,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:05,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:05,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:05,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-07-09 17:37:06,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:06,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:06,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:06,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:06,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:06,047 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:06,050 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:06,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:06,053 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:06,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:06,057 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:06,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:06,083 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:117, output treesize:57 [2021-07-09 17:37:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:06,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369204988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:06,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:06,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806962646] [2021-07-09 17:37:06,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:06,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:06,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:06,185 INFO L87 Difference]: Start difference. First operand 1352 states and 4439 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,158 INFO L93 Difference]: Finished difference Result 1959 states and 6223 transitions. [2021-07-09 17:37:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:07,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,162 INFO L225 Difference]: With dead ends: 1959 [2021-07-09 17:37:07,162 INFO L226 Difference]: Without dead ends: 1885 [2021-07-09 17:37:07,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1114.3ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-07-09 17:37:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1361. [2021-07-09 17:37:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2838235294117646) internal successors, (4466), 1360 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4466 transitions. [2021-07-09 17:37:07,179 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4466 transitions. Word has length 24 [2021-07-09 17:37:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,179 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4466 transitions. [2021-07-09 17:37:07,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4466 transitions. [2021-07-09 17:37:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:07,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,181 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-07-09 17:37:07,381 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1616972742, now seen corresponding path program 441 times [2021-07-09 17:37:07,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210104335] [2021-07-09 17:37:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:07,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210104335] [2021-07-09 17:37:07,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210104335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590960725] [2021-07-09 17:37:07,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:07,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:37:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:07,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:07,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:07,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:07,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:07,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:07,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:07,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:07,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:37:08,082 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1596], 1=[o_0, v_prenex_1595]} [2021-07-09 17:37:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:08,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:08,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,168 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.4 percent of original size [2021-07-09 17:37:08,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:37:08,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:08,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:08,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:08,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:08,207 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:08,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:08,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:08,211 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:08,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:08,242 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1595 vanished before elimination [2021-07-09 17:37:08,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:08,243 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:37:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590960725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:08,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:08,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106602613] [2021-07-09 17:37:08,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:08,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:08,338 INFO L87 Difference]: Start difference. First operand 1361 states and 4466 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:08,621 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-07-09 17:37:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:09,193 INFO L93 Difference]: Finished difference Result 1769 states and 5682 transitions. [2021-07-09 17:37:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:09,196 INFO L225 Difference]: With dead ends: 1769 [2021-07-09 17:37:09,196 INFO L226 Difference]: Without dead ends: 1716 [2021-07-09 17:37:09,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:37:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-09 17:37:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1367. [2021-07-09 17:37:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.2833089311859442) internal successors, (4485), 1366 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4485 transitions. [2021-07-09 17:37:09,212 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4485 transitions. Word has length 24 [2021-07-09 17:37:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:09,212 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4485 transitions. [2021-07-09 17:37:09,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4485 transitions. [2021-07-09 17:37:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:09,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:09,214 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:09,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:09,414 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:09,414 INFO L82 PathProgramCache]: Analyzing trace with hash 709664088, now seen corresponding path program 442 times [2021-07-09 17:37:09,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:09,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014289151] [2021-07-09 17:37:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:09,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:09,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014289151] [2021-07-09 17:37:09,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014289151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958880097] [2021-07-09 17:37:09,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:09,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:09,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:37:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:09,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:09,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:09,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:09,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:09,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:09,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:09,978 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:37:10,106 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1604, v_prenex_1606, o_2, v_prenex_1602], 1=[v_prenex_1603, o_0, v_prenex_1605, v_prenex_1601]} [2021-07-09 17:37:10,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:10,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:10,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,287 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-07-09 17:37:10,287 INFO L628 ElimStorePlain]: treesize reduction 158, result has 54.6 percent of original size [2021-07-09 17:37:10,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:10,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:37:10,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:37:10,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:10,507 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:10,511 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:10,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,574 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:37:10,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:10,579 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:10,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,641 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1601 vanished before elimination [2021-07-09 17:37:10,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:37:10,643 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-07-09 17:37:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:10,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958880097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:10,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:10,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860394855] [2021-07-09 17:37:10,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:10,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:10,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:10,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:10,799 INFO L87 Difference]: Start difference. First operand 1367 states and 4485 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,039 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-07-09 17:37:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:11,844 INFO L93 Difference]: Finished difference Result 1885 states and 5995 transitions. [2021-07-09 17:37:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:11,848 INFO L225 Difference]: With dead ends: 1885 [2021-07-09 17:37:11,848 INFO L226 Difference]: Without dead ends: 1805 [2021-07-09 17:37:11,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1240.0ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-07-09 17:37:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1370. [2021-07-09 17:37:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 3.283418553688824) internal successors, (4495), 1369 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4495 transitions. [2021-07-09 17:37:11,866 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4495 transitions. Word has length 24 [2021-07-09 17:37:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:11,866 INFO L482 AbstractCegarLoop]: Abstraction has 1370 states and 4495 transitions. [2021-07-09 17:37:11,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4495 transitions. [2021-07-09 17:37:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:11,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:11,867 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:12,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:12,068 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:12,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1634216158, now seen corresponding path program 443 times [2021-07-09 17:37:12,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:12,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374218646] [2021-07-09 17:37:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:12,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374218646] [2021-07-09 17:37:12,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374218646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972700378] [2021-07-09 17:37:12,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:12,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:37:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:12,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:12,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:12,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:12,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:12,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:12,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:12,574 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:37:12,706 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1614, o_2, v_prenex_1616, v_prenex_1612], 1=[v_prenex_1615, o_0, v_prenex_1611, v_prenex_1613]} [2021-07-09 17:37:12,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:12,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:12,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,896 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-07-09 17:37:12,903 INFO L628 ElimStorePlain]: treesize reduction 157, result has 55.0 percent of original size [2021-07-09 17:37:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:12,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:12,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:37:12,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:13,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:13,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:13,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:13,126 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1615 vanished before elimination [2021-07-09 17:37:13,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:13,131 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:13,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:13,202 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:13,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:13,206 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:13,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:13,268 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1613 vanished before elimination [2021-07-09 17:37:13,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:37:13,270 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-07-09 17:37:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:13,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972700378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:13,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:13,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456886748] [2021-07-09 17:37:13,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:13,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:13,427 INFO L87 Difference]: Start difference. First operand 1370 states and 4495 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:14,147 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-07-09 17:37:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:14,495 INFO L93 Difference]: Finished difference Result 2040 states and 6318 transitions. [2021-07-09 17:37:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:14,499 INFO L225 Difference]: With dead ends: 2040 [2021-07-09 17:37:14,499 INFO L226 Difference]: Without dead ends: 1900 [2021-07-09 17:37:14,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1137.5ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-07-09 17:37:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1391. [2021-07-09 17:37:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.2841726618705036) internal successors, (4565), 1390 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4565 transitions. [2021-07-09 17:37:14,520 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4565 transitions. Word has length 24 [2021-07-09 17:37:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:14,520 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4565 transitions. [2021-07-09 17:37:14,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4565 transitions. [2021-07-09 17:37:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:14,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:14,521 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:14,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:14,722 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1160255800, now seen corresponding path program 444 times [2021-07-09 17:37:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:14,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941947197] [2021-07-09 17:37:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:14,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:14,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941947197] [2021-07-09 17:37:14,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941947197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428988552] [2021-07-09 17:37:14,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:14,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:15,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:15,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:15,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:15,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:15,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:37:15,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-07-09 17:37:15,218 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-07-09 17:37:15,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:15,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:15,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:15,246 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:15,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:15,249 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:15,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:15,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:15,267 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:69, output treesize:27 [2021-07-09 17:37:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:15,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428988552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:15,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:15,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:15,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824483892] [2021-07-09 17:37:15,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:15,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:15,343 INFO L87 Difference]: Start difference. First operand 1391 states and 4565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:15,870 INFO L93 Difference]: Finished difference Result 1758 states and 5640 transitions. [2021-07-09 17:37:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:15,873 INFO L225 Difference]: With dead ends: 1758 [2021-07-09 17:37:15,873 INFO L226 Difference]: Without dead ends: 1727 [2021-07-09 17:37:15,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-07-09 17:37:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1391. [2021-07-09 17:37:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.2841726618705036) internal successors, (4565), 1390 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4565 transitions. [2021-07-09 17:37:15,890 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4565 transitions. Word has length 24 [2021-07-09 17:37:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:15,890 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4565 transitions. [2021-07-09 17:37:15,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4565 transitions. [2021-07-09 17:37:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:15,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:15,892 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:16,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-07-09 17:37:16,092 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:16,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1316185016, now seen corresponding path program 445 times [2021-07-09 17:37:16,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:16,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142490737] [2021-07-09 17:37:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:16,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142490737] [2021-07-09 17:37:16,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142490737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879565085] [2021-07-09 17:37:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:16,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:16,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:16,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:16,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:16,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:16,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:16,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:37:16,710 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1625, o_2, v_prenex_1627, v_prenex_1623], 1=[v_prenex_1626, v_prenex_1628, o_4, v_prenex_1624]} [2021-07-09 17:37:16,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:16,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:16,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:16,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:16,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:16,927 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:16,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:16,986 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:17,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:17,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:17,034 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:17,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:17,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:17,082 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:17,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:17,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:17,124 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:37:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:17,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879565085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:17,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:17,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:17,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334833483] [2021-07-09 17:37:17,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:17,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:17,279 INFO L87 Difference]: Start difference. First operand 1391 states and 4565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:18,236 INFO L93 Difference]: Finished difference Result 2022 states and 6388 transitions. [2021-07-09 17:37:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:18,240 INFO L225 Difference]: With dead ends: 2022 [2021-07-09 17:37:18,240 INFO L226 Difference]: Without dead ends: 1929 [2021-07-09 17:37:18,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1096.9ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-07-09 17:37:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1402. [2021-07-09 17:37:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.2919343326195576) internal successors, (4612), 1401 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4612 transitions. [2021-07-09 17:37:18,261 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4612 transitions. Word has length 24 [2021-07-09 17:37:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:18,261 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4612 transitions. [2021-07-09 17:37:18,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4612 transitions. [2021-07-09 17:37:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:18,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:18,263 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:18,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:18,464 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:18,464 INFO L82 PathProgramCache]: Analyzing trace with hash -541980646, now seen corresponding path program 446 times [2021-07-09 17:37:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:18,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467423733] [2021-07-09 17:37:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:18,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467423733] [2021-07-09 17:37:18,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467423733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010304041] [2021-07-09 17:37:18,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:18,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:18,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:18,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:18,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:18,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:18,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:18,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:18,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:19,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:19,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:19,100 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:37:19,221 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1633], 1=[o_4, v_prenex_1634]} [2021-07-09 17:37:19,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:19,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:19,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:19,275 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:19,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:19,299 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:19,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:19,319 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:37:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:19,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010304041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:19,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:19,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073980574] [2021-07-09 17:37:19,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:19,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:19,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:19,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:19,411 INFO L87 Difference]: Start difference. First operand 1402 states and 4612 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:19,866 INFO L93 Difference]: Finished difference Result 1875 states and 5987 transitions. [2021-07-09 17:37:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:19,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:19,869 INFO L225 Difference]: With dead ends: 1875 [2021-07-09 17:37:19,869 INFO L226 Difference]: Without dead ends: 1813 [2021-07-09 17:37:19,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-07-09 17:37:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1391. [2021-07-09 17:37:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.2841726618705036) internal successors, (4565), 1390 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4565 transitions. [2021-07-09 17:37:19,897 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4565 transitions. Word has length 24 [2021-07-09 17:37:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:19,897 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4565 transitions. [2021-07-09 17:37:19,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4565 transitions. [2021-07-09 17:37:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:19,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:19,898 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:20,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3601 [2021-07-09 17:37:20,099 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:20,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:20,099 INFO L82 PathProgramCache]: Analyzing trace with hash -136308526, now seen corresponding path program 447 times [2021-07-09 17:37:20,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:20,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429036731] [2021-07-09 17:37:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:20,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:20,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429036731] [2021-07-09 17:37:20,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429036731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55092057] [2021-07-09 17:37:20,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:20,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:20,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:20,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:20,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:20,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:34 [2021-07-09 17:37:20,539 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-07-09 17:37:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:37:20,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:37:20,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:20,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:20,568 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:20,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:20,571 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:20,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:20,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:20,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:27 [2021-07-09 17:37:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:20,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55092057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:20,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:20,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439029961] [2021-07-09 17:37:20,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:20,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:20,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:20,667 INFO L87 Difference]: Start difference. First operand 1391 states and 4565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:21,045 INFO L93 Difference]: Finished difference Result 1758 states and 5640 transitions. [2021-07-09 17:37:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:21,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:21,048 INFO L225 Difference]: With dead ends: 1758 [2021-07-09 17:37:21,048 INFO L226 Difference]: Without dead ends: 1727 [2021-07-09 17:37:21,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-07-09 17:37:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1391. [2021-07-09 17:37:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.2841726618705036) internal successors, (4565), 1390 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4565 transitions. [2021-07-09 17:37:21,065 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4565 transitions. Word has length 24 [2021-07-09 17:37:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:21,065 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4565 transitions. [2021-07-09 17:37:21,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4565 transitions. [2021-07-09 17:37:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:21,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:21,067 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:21,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-07-09 17:37:21,267 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:21,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1353698938, now seen corresponding path program 448 times [2021-07-09 17:37:21,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:21,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690867905] [2021-07-09 17:37:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:21,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:21,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690867905] [2021-07-09 17:37:21,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690867905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41992671] [2021-07-09 17:37:21,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:21,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:21,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:21,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:21,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:37:21,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:21,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:21,593 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:81, output treesize:72 [2021-07-09 17:37:21,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-07-09 17:37:21,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 17:37:21,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:21,705 INFO L628 ElimStorePlain]: treesize reduction 5, result has 95.9 percent of original size [2021-07-09 17:37:21,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1636 vanished before elimination [2021-07-09 17:37:21,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:37:21,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:21,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:37:21,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:21,744 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:37:21,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:21,745 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:167, output treesize:72 [2021-07-09 17:37:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:21,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41992671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:21,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:37:21,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789848284] [2021-07-09 17:37:21,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:21,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:21,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:21,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:21,827 INFO L87 Difference]: Start difference. First operand 1391 states and 4565 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:22,253 INFO L93 Difference]: Finished difference Result 1798 states and 5739 transitions. [2021-07-09 17:37:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:22,256 INFO L225 Difference]: With dead ends: 1798 [2021-07-09 17:37:22,256 INFO L226 Difference]: Without dead ends: 1767 [2021-07-09 17:37:22,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-09 17:37:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1391. [2021-07-09 17:37:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.2841726618705036) internal successors, (4565), 1390 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4565 transitions. [2021-07-09 17:37:22,273 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4565 transitions. Word has length 24 [2021-07-09 17:37:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:22,273 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4565 transitions. [2021-07-09 17:37:22,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4565 transitions. [2021-07-09 17:37:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:22,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:22,274 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:22,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3618,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,475 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1457190698, now seen corresponding path program 449 times [2021-07-09 17:37:22,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:22,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304903027] [2021-07-09 17:37:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:22,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:22,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304903027] [2021-07-09 17:37:22,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304903027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089504575] [2021-07-09 17:37:22,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:37:22,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:22,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:37:22,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:22,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:22,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:22,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:22,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:22,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:22,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:23,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:23,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:23,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-07-09 17:37:23,197 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1643], 1=[o_0, v_prenex_1642]} [2021-07-09 17:37:23,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:23,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:23,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:23,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:23,282 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.1 percent of original size [2021-07-09 17:37:23,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-07-09 17:37:23,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:23,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:23,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:23,321 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:23,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:23,325 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:23,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:23,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1642 vanished before elimination [2021-07-09 17:37:23,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:23,358 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-07-09 17:37:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:23,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089504575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:23,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:23,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:23,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449142358] [2021-07-09 17:37:23,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:23,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:23,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:23,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:23,445 INFO L87 Difference]: Start difference. First operand 1391 states and 4565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,721 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-07-09 17:37:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:24,301 INFO L93 Difference]: Finished difference Result 1774 states and 5710 transitions. [2021-07-09 17:37:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:24,305 INFO L225 Difference]: With dead ends: 1774 [2021-07-09 17:37:24,305 INFO L226 Difference]: Without dead ends: 1721 [2021-07-09 17:37:24,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:37:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-07-09 17:37:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1403. [2021-07-09 17:37:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1402 states have (on average 3.282453637660485) internal successors, (4602), 1402 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 4602 transitions. [2021-07-09 17:37:24,321 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 4602 transitions. Word has length 24 [2021-07-09 17:37:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:24,321 INFO L482 AbstractCegarLoop]: Abstraction has 1403 states and 4602 transitions. [2021-07-09 17:37:24,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 4602 transitions. [2021-07-09 17:37:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:24,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:24,323 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:24,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3623,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,523 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash -511139768, now seen corresponding path program 450 times [2021-07-09 17:37:24,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:24,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271775922] [2021-07-09 17:37:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:24,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:24,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271775922] [2021-07-09 17:37:24,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271775922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390273467] [2021-07-09 17:37:24,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:24,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:24,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:24,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:24,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:24,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:24,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:24,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:24,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:24,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:37:24,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-07-09 17:37:25,051 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1647, o_2], 1=[o_0, v_prenex_1646]} [2021-07-09 17:37:25,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:25,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:25,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:25,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:25,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:25,173 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:25,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:25,177 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:25,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:25,229 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:25,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:25,234 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:25,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:25,280 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-07-09 17:37:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:25,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390273467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:25,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:25,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068851773] [2021-07-09 17:37:25,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:25,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:25,437 INFO L87 Difference]: Start difference. First operand 1403 states and 4602 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:25,948 INFO L93 Difference]: Finished difference Result 1803 states and 5775 transitions. [2021-07-09 17:37:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:25,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:25,950 INFO L225 Difference]: With dead ends: 1803 [2021-07-09 17:37:25,951 INFO L226 Difference]: Without dead ends: 1737 [2021-07-09 17:37:25,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-07-09 17:37:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1400. [2021-07-09 17:37:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.2823445318084348) internal successors, (4592), 1399 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4592 transitions. [2021-07-09 17:37:25,967 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4592 transitions. Word has length 24 [2021-07-09 17:37:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:25,967 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 4592 transitions. [2021-07-09 17:37:25,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4592 transitions. [2021-07-09 17:37:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:25,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:25,969 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:26,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3633,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,169 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1757978424, now seen corresponding path program 451 times [2021-07-09 17:37:26,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:26,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315364610] [2021-07-09 17:37:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:26,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:26,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315364610] [2021-07-09 17:37:26,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315364610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727364889] [2021-07-09 17:37:26,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:26,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:26,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:26,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:26,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:26,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:26,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:26,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:26,703 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:37:26,797 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1652, v_prenex_1654, v_prenex_1656], 1=[o_4, v_prenex_1653, v_prenex_1655, v_prenex_1657]} [2021-07-09 17:37:26,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:26,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:26,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:26,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:26,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:26,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:26,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:27,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:27,007 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:27,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:27,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:27,057 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:27,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:27,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:27,105 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:27,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:27,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:27,152 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:27,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:27,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:27,203 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:37:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:27,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727364889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:27,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:27,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392621998] [2021-07-09 17:37:27,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:27,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:27,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:27,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:27,358 INFO L87 Difference]: Start difference. First operand 1400 states and 4592 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:28,204 INFO L93 Difference]: Finished difference Result 1990 states and 6297 transitions. [2021-07-09 17:37:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:28,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:28,208 INFO L225 Difference]: With dead ends: 1990 [2021-07-09 17:37:28,208 INFO L226 Difference]: Without dead ends: 1897 [2021-07-09 17:37:28,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1096.1ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2021-07-09 17:37:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1411. [2021-07-09 17:37:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 3.2900709219858157) internal successors, (4639), 1410 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 4639 transitions. [2021-07-09 17:37:28,227 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 4639 transitions. Word has length 24 [2021-07-09 17:37:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:28,227 INFO L482 AbstractCegarLoop]: Abstraction has 1411 states and 4639 transitions. [2021-07-09 17:37:28,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 4639 transitions. [2021-07-09 17:37:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:28,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:28,228 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:28,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3646 [2021-07-09 17:37:28,429 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:28,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1762784502, now seen corresponding path program 452 times [2021-07-09 17:37:28,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:28,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434012401] [2021-07-09 17:37:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:28,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:28,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434012401] [2021-07-09 17:37:28,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434012401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223854070] [2021-07-09 17:37:28,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:28,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:28,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:28,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:28,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:28,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:28,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:28,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:28,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:28,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:28,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:29,051 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-07-09 17:37:29,170 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1662], 1=[o_4, v_prenex_1663]} [2021-07-09 17:37:29,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:29,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:29,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:29,223 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:29,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:29,248 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:29,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:29,267 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:37:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:29,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223854070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:29,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:29,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043404397] [2021-07-09 17:37:29,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:29,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:29,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:29,358 INFO L87 Difference]: Start difference. First operand 1411 states and 4639 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:29,839 INFO L93 Difference]: Finished difference Result 1843 states and 5896 transitions. [2021-07-09 17:37:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:29,842 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 17:37:29,842 INFO L226 Difference]: Without dead ends: 1781 [2021-07-09 17:37:29,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 771.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-07-09 17:37:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1397. [2021-07-09 17:37:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.2829512893982806) internal successors, (4583), 1396 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4583 transitions. [2021-07-09 17:37:29,860 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4583 transitions. Word has length 24 [2021-07-09 17:37:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:29,860 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4583 transitions. [2021-07-09 17:37:29,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4583 transitions. [2021-07-09 17:37:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:29,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:29,861 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:30,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3658,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:30,062 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:30,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1030783590, now seen corresponding path program 453 times [2021-07-09 17:37:30,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:30,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236800744] [2021-07-09 17:37:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:30,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236800744] [2021-07-09 17:37:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236800744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672867633] [2021-07-09 17:37:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:30,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:30,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:30,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:30,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:30,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:30,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:30,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:30,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:30,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-07-09 17:37:30,641 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1670, v_prenex_1672, v_prenex_1668], 1=[v_prenex_1669, o_4, v_prenex_1671, v_prenex_1673]} [2021-07-09 17:37:30,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:30,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:30,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:30,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:30,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:30,855 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:30,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:30,904 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:30,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:37:30,951 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:30,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:30,998 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:31,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:31,041 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-07-09 17:37:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:31,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672867633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:31,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:31,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407048646] [2021-07-09 17:37:31,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:31,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:31,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:31,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:31,196 INFO L87 Difference]: Start difference. First operand 1397 states and 4583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,741 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-07-09 17:37:32,108 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-09 17:37:32,612 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-09 17:37:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:32,618 INFO L93 Difference]: Finished difference Result 2176 states and 6851 transitions. [2021-07-09 17:37:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:32,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:32,622 INFO L225 Difference]: With dead ends: 2176 [2021-07-09 17:37:32,622 INFO L226 Difference]: Without dead ends: 2083 [2021-07-09 17:37:32,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1507.3ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-07-09 17:37:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1422. [2021-07-09 17:37:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.294862772695285) internal successors, (4682), 1421 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4682 transitions. [2021-07-09 17:37:32,641 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4682 transitions. Word has length 24 [2021-07-09 17:37:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:32,641 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4682 transitions. [2021-07-09 17:37:32,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4682 transitions. [2021-07-09 17:37:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:32,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:32,643 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:32,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-07-09 17:37:32,844 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:32,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1804987960, now seen corresponding path program 454 times [2021-07-09 17:37:32,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:32,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158127280] [2021-07-09 17:37:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:33,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:33,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158127280] [2021-07-09 17:37:33,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158127280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133809696] [2021-07-09 17:37:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:33,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:33,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:33,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:33,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:33,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:33,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:33,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:33,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:33,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:33,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:33,341 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-07-09 17:37:33,549 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1678], 1=[o_4, v_prenex_1679]} [2021-07-09 17:37:33,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:33,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:33,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:33,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:33,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:33,604 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:33,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:33,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:33,628 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:33,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:33,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:33,647 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-07-09 17:37:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:33,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133809696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:33,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:33,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128853700] [2021-07-09 17:37:33,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:33,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:33,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:33,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:33,741 INFO L87 Difference]: Start difference. First operand 1422 states and 4682 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,079 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-07-09 17:37:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:35,082 INFO L93 Difference]: Finished difference Result 2208 states and 6967 transitions. [2021-07-09 17:37:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:35,086 INFO L225 Difference]: With dead ends: 2208 [2021-07-09 17:37:35,086 INFO L226 Difference]: Without dead ends: 2119 [2021-07-09 17:37:35,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1458.3ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-07-09 17:37:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1425. [2021-07-09 17:37:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.298455056179775) internal successors, (4697), 1424 states have internal predecessors, (4697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4697 transitions. [2021-07-09 17:37:35,106 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4697 transitions. Word has length 24 [2021-07-09 17:37:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:35,106 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4697 transitions. [2021-07-09 17:37:35,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4697 transitions. [2021-07-09 17:37:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:35,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:35,108 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:35,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3682 [2021-07-09 17:37:35,308 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1642982730, now seen corresponding path program 455 times [2021-07-09 17:37:35,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:35,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324121683] [2021-07-09 17:37:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:35,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:35,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324121683] [2021-07-09 17:37:35,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324121683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531791458] [2021-07-09 17:37:35,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:35,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:35,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:35,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:35,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:35,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:37:35,625 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-07-09 17:37:35,704 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-07-09 17:37:35,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:35,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:35,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:35,737 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:35,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:37:35,741 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:35,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:35,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-07-09 17:37:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:35,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531791458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:35,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:35,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212572565] [2021-07-09 17:37:35,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:35,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:35,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:35,847 INFO L87 Difference]: Start difference. First operand 1425 states and 4697 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:37,115 INFO L93 Difference]: Finished difference Result 2242 states and 7092 transitions. [2021-07-09 17:37:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:37:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:37,119 INFO L225 Difference]: With dead ends: 2242 [2021-07-09 17:37:37,119 INFO L226 Difference]: Without dead ends: 2183 [2021-07-09 17:37:37,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1067.1ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:37:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-07-09 17:37:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1408. [2021-07-09 17:37:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.292821606254442) internal successors, (4633), 1407 states have internal predecessors, (4633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4633 transitions. [2021-07-09 17:37:37,141 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4633 transitions. Word has length 24 [2021-07-09 17:37:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:37,141 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4633 transitions. [2021-07-09 17:37:37,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4633 transitions. [2021-07-09 17:37:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:37:37,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:37,142 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:37,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3694 [2021-07-09 17:37:37,343 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1658899902, now seen corresponding path program 456 times [2021-07-09 17:37:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:37,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122427130] [2021-07-09 17:37:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:37,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122427130] [2021-07-09 17:37:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122427130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58100884] [2021-07-09 17:37:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:37,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:37:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:37,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:37,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:37,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:28 [2021-07-09 17:37:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:37:37,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:37:37,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:37,680 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:37:37,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:37,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:27 [2021-07-09 17:37:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:37,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58100884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:37,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:37:37,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811867666] [2021-07-09 17:37:37,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:37:37,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:37:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:37,745 INFO L87 Difference]: Start difference. First operand 1408 states and 4633 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,093 INFO L93 Difference]: Finished difference Result 1671 states and 5386 transitions. [2021-07-09 17:37:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:37:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,096 INFO L225 Difference]: With dead ends: 1671 [2021-07-09 17:37:38,096 INFO L226 Difference]: Without dead ends: 1640 [2021-07-09 17:37:38,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-07-09 17:37:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1400. [2021-07-09 17:37:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.2973552537526807) internal successors, (4613), 1399 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4613 transitions. [2021-07-09 17:37:38,112 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4613 transitions. Word has length 24 [2021-07-09 17:37:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,112 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 4613 transitions. [2021-07-09 17:37:38,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4613 transitions. [2021-07-09 17:37:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:38,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,114 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:38,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3699 [2021-07-09 17:37:38,314 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1703849285, now seen corresponding path program 457 times [2021-07-09 17:37:38,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:38,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628722582] [2021-07-09 17:37:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:38,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:38,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628722582] [2021-07-09 17:37:38,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628722582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878667985] [2021-07-09 17:37:38,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:38,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:38,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:38,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:38,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:38,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:37:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:38,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878667985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:38,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 17:37:38,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571750741] [2021-07-09 17:37:38,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:38,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:38,492 INFO L87 Difference]: Start difference. First operand 1400 states and 4613 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,662 INFO L93 Difference]: Finished difference Result 1930 states and 6308 transitions. [2021-07-09 17:37:38,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:38,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:38,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,665 INFO L225 Difference]: With dead ends: 1930 [2021-07-09 17:37:38,665 INFO L226 Difference]: Without dead ends: 1930 [2021-07-09 17:37:38,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:38,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-07-09 17:37:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1414. [2021-07-09 17:37:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.3043170559094124) internal successors, (4669), 1413 states have internal predecessors, (4669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4669 transitions. [2021-07-09 17:37:38,684 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4669 transitions. Word has length 25 [2021-07-09 17:37:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,684 INFO L482 AbstractCegarLoop]: Abstraction has 1414 states and 4669 transitions. [2021-07-09 17:37:38,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4669 transitions. [2021-07-09 17:37:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:38,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,686 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:38,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,886 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash 570825585, now seen corresponding path program 458 times [2021-07-09 17:37:38,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:38,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739638296] [2021-07-09 17:37:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:38,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739638296] [2021-07-09 17:37:38,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739638296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629028320] [2021-07-09 17:37:38,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:38,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:39,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:39,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:39,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:39,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:39,043 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:37:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:39,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629028320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:39,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881716872] [2021-07-09 17:37:39,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:39,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:39,106 INFO L87 Difference]: Start difference. First operand 1414 states and 4669 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:39,359 INFO L93 Difference]: Finished difference Result 1776 states and 5800 transitions. [2021-07-09 17:37:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:39,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:39,362 INFO L225 Difference]: With dead ends: 1776 [2021-07-09 17:37:39,362 INFO L226 Difference]: Without dead ends: 1734 [2021-07-09 17:37:39,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-07-09 17:37:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1414. [2021-07-09 17:37:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.299363057324841) internal successors, (4662), 1413 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4662 transitions. [2021-07-09 17:37:39,379 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4662 transitions. Word has length 25 [2021-07-09 17:37:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:39,379 INFO L482 AbstractCegarLoop]: Abstraction has 1414 states and 4662 transitions. [2021-07-09 17:37:39,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4662 transitions. [2021-07-09 17:37:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:39,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:39,381 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:39,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3704,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:39,581 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash 21712971, now seen corresponding path program 459 times [2021-07-09 17:37:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:39,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061559488] [2021-07-09 17:37:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:39,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:39,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061559488] [2021-07-09 17:37:39,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061559488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132822845] [2021-07-09 17:37:39,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:39,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:39,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:39,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:39,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:39,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:39,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:39,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:39,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:37:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132822845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887730462] [2021-07-09 17:37:39,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:39,798 INFO L87 Difference]: Start difference. First operand 1414 states and 4662 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:40,004 INFO L93 Difference]: Finished difference Result 1993 states and 6490 transitions. [2021-07-09 17:37:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:40,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:40,007 INFO L225 Difference]: With dead ends: 1993 [2021-07-09 17:37:40,007 INFO L226 Difference]: Without dead ends: 1993 [2021-07-09 17:37:40,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-07-09 17:37:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1427. [2021-07-09 17:37:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.3015427769985974) internal successors, (4708), 1426 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4708 transitions. [2021-07-09 17:37:40,027 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4708 transitions. Word has length 25 [2021-07-09 17:37:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,027 INFO L482 AbstractCegarLoop]: Abstraction has 1427 states and 4708 transitions. [2021-07-09 17:37:40,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4708 transitions. [2021-07-09 17:37:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:40,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,029 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3707,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,229 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash 445784881, now seen corresponding path program 460 times [2021-07-09 17:37:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087933510] [2021-07-09 17:37:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:40,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:40,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087933510] [2021-07-09 17:37:40,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087933510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586543779] [2021-07-09 17:37:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:40,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:40,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:40,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:40,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:40,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:40,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:40,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:40,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:37:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:40,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586543779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:40,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:40,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045258908] [2021-07-09 17:37:40,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:40,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:40,491 INFO L87 Difference]: Start difference. First operand 1427 states and 4708 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:40,754 INFO L93 Difference]: Finished difference Result 1762 states and 5758 transitions. [2021-07-09 17:37:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:40,757 INFO L225 Difference]: With dead ends: 1762 [2021-07-09 17:37:40,757 INFO L226 Difference]: Without dead ends: 1734 [2021-07-09 17:37:40,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-07-09 17:37:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1427. [2021-07-09 17:37:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.2966339410939693) internal successors, (4701), 1426 states have internal predecessors, (4701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4701 transitions. [2021-07-09 17:37:40,774 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4701 transitions. Word has length 25 [2021-07-09 17:37:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,774 INFO L482 AbstractCegarLoop]: Abstraction has 1427 states and 4701 transitions. [2021-07-09 17:37:40,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4701 transitions. [2021-07-09 17:37:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:40,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,776 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3710,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,976 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1518166061, now seen corresponding path program 461 times [2021-07-09 17:37:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852471790] [2021-07-09 17:37:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:41,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:41,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852471790] [2021-07-09 17:37:41,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852471790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28887569] [2021-07-09 17:37:41,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:41,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:41,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:41,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:41,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:41,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:41,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:41,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:37:41,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:41,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:41,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:41,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:41,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:41,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:41,191 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,224 INFO L628 ElimStorePlain]: treesize reduction 62, result has 28.7 percent of original size [2021-07-09 17:37:41,224 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:41,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:41,225 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:173, output treesize:25 [2021-07-09 17:37:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:41,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28887569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:37:41,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038617489] [2021-07-09 17:37:41,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:41,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:41,266 INFO L87 Difference]: Start difference. First operand 1427 states and 4701 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:41,590 INFO L93 Difference]: Finished difference Result 1999 states and 6507 transitions. [2021-07-09 17:37:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:41,594 INFO L225 Difference]: With dead ends: 1999 [2021-07-09 17:37:41,594 INFO L226 Difference]: Without dead ends: 1999 [2021-07-09 17:37:41,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2021-07-09 17:37:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1433. [2021-07-09 17:37:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.295391061452514) internal successors, (4719), 1432 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4719 transitions. [2021-07-09 17:37:41,614 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4719 transitions. Word has length 25 [2021-07-09 17:37:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:41,614 INFO L482 AbstractCegarLoop]: Abstraction has 1433 states and 4719 transitions. [2021-07-09 17:37:41,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4719 transitions. [2021-07-09 17:37:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:41,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:41,616 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:41,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3713 [2021-07-09 17:37:41,816 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash 807766991, now seen corresponding path program 462 times [2021-07-09 17:37:41,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:41,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326056401] [2021-07-09 17:37:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:41,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:41,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326056401] [2021-07-09 17:37:41,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326056401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877495266] [2021-07-09 17:37:41,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:41,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:41,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:41,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:41,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:41,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:41,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:41,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:42,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877495266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:42,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:42,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816513447] [2021-07-09 17:37:42,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:42,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:42,075 INFO L87 Difference]: Start difference. First operand 1433 states and 4719 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:42,565 INFO L93 Difference]: Finished difference Result 1823 states and 5924 transitions. [2021-07-09 17:37:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:42,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:42,569 INFO L225 Difference]: With dead ends: 1823 [2021-07-09 17:37:42,569 INFO L226 Difference]: Without dead ends: 1809 [2021-07-09 17:37:42,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 471.9ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-07-09 17:37:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1443. [2021-07-09 17:37:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 3.2981969486823854) internal successors, (4756), 1442 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 4756 transitions. [2021-07-09 17:37:42,586 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 4756 transitions. Word has length 25 [2021-07-09 17:37:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:42,586 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 4756 transitions. [2021-07-09 17:37:42,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 4756 transitions. [2021-07-09 17:37:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:42,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:42,588 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:42,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3717,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,788 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash 542349169, now seen corresponding path program 463 times [2021-07-09 17:37:42,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:42,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131193190] [2021-07-09 17:37:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:42,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:42,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131193190] [2021-07-09 17:37:42,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131193190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782044730] [2021-07-09 17:37:42,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:42,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:42,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:42,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:42,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:42,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:42,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:37:43,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:43,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:43,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:43,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:43,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:43,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:43,069 INFO L628 ElimStorePlain]: treesize reduction 47, result has 31.9 percent of original size [2021-07-09 17:37:43,069 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:43,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:43,070 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:22 [2021-07-09 17:37:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:43,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782044730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:37:43,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184878291] [2021-07-09 17:37:43,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:43,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:43,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:43,109 INFO L87 Difference]: Start difference. First operand 1443 states and 4756 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:43,388 INFO L93 Difference]: Finished difference Result 1744 states and 5723 transitions. [2021-07-09 17:37:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:43,391 INFO L225 Difference]: With dead ends: 1744 [2021-07-09 17:37:43,391 INFO L226 Difference]: Without dead ends: 1744 [2021-07-09 17:37:43,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-07-09 17:37:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1422. [2021-07-09 17:37:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.2976776917663617) internal successors, (4686), 1421 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4686 transitions. [2021-07-09 17:37:43,408 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4686 transitions. Word has length 25 [2021-07-09 17:37:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:43,409 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4686 transitions. [2021-07-09 17:37:43,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4686 transitions. [2021-07-09 17:37:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:43,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:43,410 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:43,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3723 [2021-07-09 17:37:43,611 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash -459864507, now seen corresponding path program 464 times [2021-07-09 17:37:43,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:43,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674845598] [2021-07-09 17:37:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:43,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674845598] [2021-07-09 17:37:43,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674845598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578065356] [2021-07-09 17:37:43,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:43,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:43,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:43,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:43,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:43,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:43,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:43,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:43,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:43,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:43,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,824 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-07-09 17:37:43,825 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:43,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,825 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-07-09 17:37:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:43,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578065356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:43,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075803106] [2021-07-09 17:37:43,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:43,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:43,842 INFO L87 Difference]: Start difference. First operand 1422 states and 4686 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,019 INFO L93 Difference]: Finished difference Result 1567 states and 5144 transitions. [2021-07-09 17:37:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:44,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,022 INFO L225 Difference]: With dead ends: 1567 [2021-07-09 17:37:44,022 INFO L226 Difference]: Without dead ends: 1567 [2021-07-09 17:37:44,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-07-09 17:37:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1438. [2021-07-09 17:37:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.2936673625608908) internal successors, (4733), 1437 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4733 transitions. [2021-07-09 17:37:44,039 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4733 transitions. Word has length 25 [2021-07-09 17:37:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,039 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4733 transitions. [2021-07-09 17:37:44,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4733 transitions. [2021-07-09 17:37:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:44,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,041 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:44,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3727 [2021-07-09 17:37:44,241 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1420888431, now seen corresponding path program 465 times [2021-07-09 17:37:44,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:44,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236940989] [2021-07-09 17:37:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:44,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:44,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236940989] [2021-07-09 17:37:44,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236940989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412689761] [2021-07-09 17:37:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:44,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:44,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:44,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:44,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:44,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:44,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:44,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:44,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:44,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412689761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:44,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:44,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489340315] [2021-07-09 17:37:44,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:44,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:44,478 INFO L87 Difference]: Start difference. First operand 1438 states and 4733 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,747 INFO L93 Difference]: Finished difference Result 1642 states and 5381 transitions. [2021-07-09 17:37:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,750 INFO L225 Difference]: With dead ends: 1642 [2021-07-09 17:37:44,750 INFO L226 Difference]: Without dead ends: 1642 [2021-07-09 17:37:44,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-07-09 17:37:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1426. [2021-07-09 17:37:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.296140350877193) internal successors, (4697), 1425 states have internal predecessors, (4697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4697 transitions. [2021-07-09 17:37:44,767 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4697 transitions. Word has length 25 [2021-07-09 17:37:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,767 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4697 transitions. [2021-07-09 17:37:44,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4697 transitions. [2021-07-09 17:37:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:44,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,769 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:44,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3729 [2021-07-09 17:37:44,969 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash 326189513, now seen corresponding path program 466 times [2021-07-09 17:37:44,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:44,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595284675] [2021-07-09 17:37:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:45,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:45,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595284675] [2021-07-09 17:37:45,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595284675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736159787] [2021-07-09 17:37:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:45,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:45,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:45,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:45,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:45,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:37:45,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:45,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:45,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:45,221 INFO L628 ElimStorePlain]: treesize reduction 78, result has 27.1 percent of original size [2021-07-09 17:37:45,221 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:45,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:45,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:45,235 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1681 vanished before elimination [2021-07-09 17:37:45,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:45,235 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:22 [2021-07-09 17:37:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:45,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736159787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:45,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53113407] [2021-07-09 17:37:45,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:45,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:45,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:45,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:45,266 INFO L87 Difference]: Start difference. First operand 1426 states and 4697 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:45,521 INFO L93 Difference]: Finished difference Result 1603 states and 5215 transitions. [2021-07-09 17:37:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:45,523 INFO L225 Difference]: With dead ends: 1603 [2021-07-09 17:37:45,524 INFO L226 Difference]: Without dead ends: 1589 [2021-07-09 17:37:45,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-07-09 17:37:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1454. [2021-07-09 17:37:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.29525120440468) internal successors, (4788), 1453 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4788 transitions. [2021-07-09 17:37:45,539 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4788 transitions. Word has length 25 [2021-07-09 17:37:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:45,539 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4788 transitions. [2021-07-09 17:37:45,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4788 transitions. [2021-07-09 17:37:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:45,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:45,541 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:45,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3737,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,741 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 60771691, now seen corresponding path program 467 times [2021-07-09 17:37:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:45,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603807288] [2021-07-09 17:37:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:45,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:45,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603807288] [2021-07-09 17:37:45,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603807288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236085178] [2021-07-09 17:37:45,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:45,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:45,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:45,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:45,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:45,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:45,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:37:45,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:45,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:45,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:45,997 INFO L628 ElimStorePlain]: treesize reduction 67, result has 37.4 percent of original size [2021-07-09 17:37:45,998 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:45,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:46,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:46,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:46,021 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1683 vanished before elimination [2021-07-09 17:37:46,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:46,022 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:22 [2021-07-09 17:37:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:46,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236085178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:46,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:37:46,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522116918] [2021-07-09 17:37:46,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:46,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:46,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:46,061 INFO L87 Difference]: Start difference. First operand 1454 states and 4788 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:46,281 INFO L93 Difference]: Finished difference Result 1542 states and 5068 transitions. [2021-07-09 17:37:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:46,281 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:46,283 INFO L225 Difference]: With dead ends: 1542 [2021-07-09 17:37:46,284 INFO L226 Difference]: Without dead ends: 1542 [2021-07-09 17:37:46,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-07-09 17:37:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1419. [2021-07-09 17:37:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.297602256699577) internal successors, (4676), 1418 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4676 transitions. [2021-07-09 17:37:46,299 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4676 transitions. Word has length 25 [2021-07-09 17:37:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:46,299 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4676 transitions. [2021-07-09 17:37:46,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4676 transitions. [2021-07-09 17:37:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:46,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:46,301 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:46,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3741,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:46,501 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash -767294745, now seen corresponding path program 468 times [2021-07-09 17:37:46,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:46,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684894842] [2021-07-09 17:37:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:46,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684894842] [2021-07-09 17:37:46,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684894842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146656775] [2021-07-09 17:37:46,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:46,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:46,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:46,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:46,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:46,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:46,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:46,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:46,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:46,676 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-07-09 17:37:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:46,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146656775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:46,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:46,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460060944] [2021-07-09 17:37:46,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:46,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:46,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:46,733 INFO L87 Difference]: Start difference. First operand 1419 states and 4676 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:46,981 INFO L93 Difference]: Finished difference Result 1619 states and 5261 transitions. [2021-07-09 17:37:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:46,983 INFO L225 Difference]: With dead ends: 1619 [2021-07-09 17:37:46,983 INFO L226 Difference]: Without dead ends: 1619 [2021-07-09 17:37:46,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-07-09 17:37:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1427. [2021-07-09 17:37:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.3008415147265078) internal successors, (4707), 1426 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4707 transitions. [2021-07-09 17:37:47,001 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4707 transitions. Word has length 25 [2021-07-09 17:37:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:47,001 INFO L482 AbstractCegarLoop]: Abstraction has 1427 states and 4707 transitions. [2021-07-09 17:37:47,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4707 transitions. [2021-07-09 17:37:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:47,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:47,002 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:47,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3744,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:47,203 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1253076159, now seen corresponding path program 469 times [2021-07-09 17:37:47,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:47,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510428300] [2021-07-09 17:37:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:47,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:47,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510428300] [2021-07-09 17:37:47,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510428300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066739060] [2021-07-09 17:37:47,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:47,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:47,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:47,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:47,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:47,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:47,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:47,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:47,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:47,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,457 INFO L628 ElimStorePlain]: treesize reduction 108, result has 22.3 percent of original size [2021-07-09 17:37:47,457 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:47,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:37:47,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:47,470 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1685 vanished before elimination [2021-07-09 17:37:47,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:47,471 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:22 [2021-07-09 17:37:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:47,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066739060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:47,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:37:47,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284202755] [2021-07-09 17:37:47,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:47,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:47,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:47,509 INFO L87 Difference]: Start difference. First operand 1427 states and 4707 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:47,787 INFO L93 Difference]: Finished difference Result 1758 states and 5672 transitions. [2021-07-09 17:37:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:47,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:47,790 INFO L225 Difference]: With dead ends: 1758 [2021-07-09 17:37:47,790 INFO L226 Difference]: Without dead ends: 1758 [2021-07-09 17:37:47,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-09 17:37:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1416. [2021-07-09 17:37:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.313780918727915) internal successors, (4689), 1415 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4689 transitions. [2021-07-09 17:37:47,808 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4689 transitions. Word has length 25 [2021-07-09 17:37:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:47,808 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4689 transitions. [2021-07-09 17:37:47,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4689 transitions. [2021-07-09 17:37:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:47,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:47,810 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:48,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3749 [2021-07-09 17:37:48,025 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:48,025 INFO L82 PathProgramCache]: Analyzing trace with hash 18759275, now seen corresponding path program 470 times [2021-07-09 17:37:48,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:48,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908165570] [2021-07-09 17:37:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:48,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908165570] [2021-07-09 17:37:48,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908165570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598155410] [2021-07-09 17:37:48,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:48,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:48,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:48,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:48,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:48,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:48,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:48,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:48,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:48,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:48,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:48,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598155410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:48,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:48,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410606991] [2021-07-09 17:37:48,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:48,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:48,236 INFO L87 Difference]: Start difference. First operand 1416 states and 4689 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:48,429 INFO L93 Difference]: Finished difference Result 1570 states and 5143 transitions. [2021-07-09 17:37:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:48,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:48,431 INFO L225 Difference]: With dead ends: 1570 [2021-07-09 17:37:48,431 INFO L226 Difference]: Without dead ends: 1570 [2021-07-09 17:37:48,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-07-09 17:37:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1409. [2021-07-09 17:37:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.305397727272727) internal successors, (4654), 1408 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4654 transitions. [2021-07-09 17:37:48,447 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4654 transitions. Word has length 25 [2021-07-09 17:37:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:48,448 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4654 transitions. [2021-07-09 17:37:48,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4654 transitions. [2021-07-09 17:37:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:48,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:48,449 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:48,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3755 [2021-07-09 17:37:48,650 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1630044805, now seen corresponding path program 471 times [2021-07-09 17:37:48,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:48,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218650122] [2021-07-09 17:37:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:48,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:48,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218650122] [2021-07-09 17:37:48,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218650122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731816221] [2021-07-09 17:37:48,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:48,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:48,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:48,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:48,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:48,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:48,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:48,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:48,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:48,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:37:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:48,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731816221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:48,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:48,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450578285] [2021-07-09 17:37:48,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:48,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:48,880 INFO L87 Difference]: Start difference. First operand 1409 states and 4654 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,106 INFO L93 Difference]: Finished difference Result 1526 states and 4998 transitions. [2021-07-09 17:37:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,108 INFO L225 Difference]: With dead ends: 1526 [2021-07-09 17:37:49,108 INFO L226 Difference]: Without dead ends: 1496 [2021-07-09 17:37:49,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-09 17:37:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1409. [2021-07-09 17:37:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3004261363636362) internal successors, (4647), 1408 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4647 transitions. [2021-07-09 17:37:49,123 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4647 transitions. Word has length 25 [2021-07-09 17:37:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,123 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4647 transitions. [2021-07-09 17:37:49,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4647 transitions. [2021-07-09 17:37:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:49,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,125 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:49,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3758,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,325 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:49,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1151485963, now seen corresponding path program 472 times [2021-07-09 17:37:49,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:49,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312581031] [2021-07-09 17:37:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:49,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:49,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312581031] [2021-07-09 17:37:49,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312581031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023860948] [2021-07-09 17:37:49,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:49,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:49,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:49,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:49,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:49,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:49,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:49,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:49,524 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:49,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023860948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:49,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 17:37:49,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050357774] [2021-07-09 17:37:49,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:49,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:49,556 INFO L87 Difference]: Start difference. First operand 1409 states and 4647 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,714 INFO L93 Difference]: Finished difference Result 1545 states and 5074 transitions. [2021-07-09 17:37:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,716 INFO L225 Difference]: With dead ends: 1545 [2021-07-09 17:37:49,716 INFO L226 Difference]: Without dead ends: 1545 [2021-07-09 17:37:49,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-07-09 17:37:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1409. [2021-07-09 17:37:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3004261363636362) internal successors, (4647), 1408 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4647 transitions. [2021-07-09 17:37:49,732 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4647 transitions. Word has length 25 [2021-07-09 17:37:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,733 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4647 transitions. [2021-07-09 17:37:49,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4647 transitions. [2021-07-09 17:37:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:49,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,734 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:49,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,935 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1262728395, now seen corresponding path program 473 times [2021-07-09 17:37:49,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:49,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806092481] [2021-07-09 17:37:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:50,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806092481] [2021-07-09 17:37:50,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806092481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716226199] [2021-07-09 17:37:50,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:50,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:50,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:50,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:50,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:50,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:50,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:50,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:50,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:50,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716226199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:50,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:50,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488721056] [2021-07-09 17:37:50,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:50,163 INFO L87 Difference]: Start difference. First operand 1409 states and 4647 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:50,545 INFO L93 Difference]: Finished difference Result 1587 states and 5200 transitions. [2021-07-09 17:37:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:50,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:50,548 INFO L225 Difference]: With dead ends: 1587 [2021-07-09 17:37:50,548 INFO L226 Difference]: Without dead ends: 1587 [2021-07-09 17:37:50,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-07-09 17:37:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1409. [2021-07-09 17:37:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3004261363636362) internal successors, (4647), 1408 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4647 transitions. [2021-07-09 17:37:50,565 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4647 transitions. Word has length 25 [2021-07-09 17:37:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:50,565 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4647 transitions. [2021-07-09 17:37:50,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4647 transitions. [2021-07-09 17:37:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:50,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:50,567 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:50,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3765,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:50,767 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1718391051, now seen corresponding path program 474 times [2021-07-09 17:37:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:50,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093438706] [2021-07-09 17:37:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:50,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:50,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093438706] [2021-07-09 17:37:50,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093438706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125780658] [2021-07-09 17:37:50,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:50,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:50,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:50,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:50,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:50,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:50,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:50,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:50,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:50,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-07-09 17:37:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:51,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125780658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:51,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803745041] [2021-07-09 17:37:51,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:51,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:51,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:51,006 INFO L87 Difference]: Start difference. First operand 1409 states and 4647 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:51,241 INFO L93 Difference]: Finished difference Result 1644 states and 5339 transitions. [2021-07-09 17:37:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:51,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:51,244 INFO L225 Difference]: With dead ends: 1644 [2021-07-09 17:37:51,244 INFO L226 Difference]: Without dead ends: 1644 [2021-07-09 17:37:51,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-09 17:37:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1423. [2021-07-09 17:37:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.30239099859353) internal successors, (4696), 1422 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4696 transitions. [2021-07-09 17:37:51,261 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4696 transitions. Word has length 25 [2021-07-09 17:37:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:51,261 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 4696 transitions. [2021-07-09 17:37:51,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4696 transitions. [2021-07-09 17:37:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:51,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:51,263 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:51,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3774,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,463 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash -516061015, now seen corresponding path program 475 times [2021-07-09 17:37:51,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:51,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030640762] [2021-07-09 17:37:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:51,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:51,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030640762] [2021-07-09 17:37:51,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030640762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805904087] [2021-07-09 17:37:51,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:51,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:51,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:51,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:51,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:51,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:51,625 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:51,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:51,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:51,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,714 INFO L628 ElimStorePlain]: treesize reduction 108, result has 22.3 percent of original size [2021-07-09 17:37:51,714 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:51,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:37:51,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1687 vanished before elimination [2021-07-09 17:37:51,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:51,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:22 [2021-07-09 17:37:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805904087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:51,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637141332] [2021-07-09 17:37:51,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:51,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:51,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:51,765 INFO L87 Difference]: Start difference. First operand 1423 states and 4696 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:52,006 INFO L93 Difference]: Finished difference Result 1729 states and 5575 transitions. [2021-07-09 17:37:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:52,009 INFO L225 Difference]: With dead ends: 1729 [2021-07-09 17:37:52,009 INFO L226 Difference]: Without dead ends: 1729 [2021-07-09 17:37:52,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-07-09 17:37:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1430. [2021-07-09 17:37:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.3156053184044785) internal successors, (4738), 1429 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 4738 transitions. [2021-07-09 17:37:52,027 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 4738 transitions. Word has length 25 [2021-07-09 17:37:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:52,027 INFO L482 AbstractCegarLoop]: Abstraction has 1430 states and 4738 transitions. [2021-07-09 17:37:52,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 4738 transitions. [2021-07-09 17:37:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:52,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:52,029 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:52,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3779,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:52,229 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109745, now seen corresponding path program 476 times [2021-07-09 17:37:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:52,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296375219] [2021-07-09 17:37:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:52,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296375219] [2021-07-09 17:37:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296375219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603182753] [2021-07-09 17:37:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:52,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:52,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:52,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:52,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:52,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:52,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:52,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:52,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:52,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603182753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:52,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:52,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154932234] [2021-07-09 17:37:52,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:52,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:52,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:52,430 INFO L87 Difference]: Start difference. First operand 1430 states and 4738 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:52,591 INFO L93 Difference]: Finished difference Result 1591 states and 5208 transitions. [2021-07-09 17:37:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:52,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:52,594 INFO L225 Difference]: With dead ends: 1591 [2021-07-09 17:37:52,594 INFO L226 Difference]: Without dead ends: 1591 [2021-07-09 17:37:52,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-07-09 17:37:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1416. [2021-07-09 17:37:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.303886925795053) internal successors, (4675), 1415 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4675 transitions. [2021-07-09 17:37:52,609 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4675 transitions. Word has length 25 [2021-07-09 17:37:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:52,609 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4675 transitions. [2021-07-09 17:37:52,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4675 transitions. [2021-07-09 17:37:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:52,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:52,611 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:52,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:52,811 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:52,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1053572021, now seen corresponding path program 477 times [2021-07-09 17:37:52,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:52,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908931492] [2021-07-09 17:37:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:52,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:52,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908931492] [2021-07-09 17:37:52,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908931492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304002661] [2021-07-09 17:37:52,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:52,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:52,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:52,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:52,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:52,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:52,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:52,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:52,979 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:37:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:53,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304002661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:53,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:37:53,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653962014] [2021-07-09 17:37:53,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:53,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:53,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:53,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:53,036 INFO L87 Difference]: Start difference. First operand 1416 states and 4675 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:53,251 INFO L93 Difference]: Finished difference Result 1540 states and 5035 transitions. [2021-07-09 17:37:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:53,254 INFO L225 Difference]: With dead ends: 1540 [2021-07-09 17:37:53,254 INFO L226 Difference]: Without dead ends: 1510 [2021-07-09 17:37:53,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-07-09 17:37:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1409. [2021-07-09 17:37:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3004261363636362) internal successors, (4647), 1408 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4647 transitions. [2021-07-09 17:37:53,269 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4647 transitions. Word has length 25 [2021-07-09 17:37:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:53,269 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4647 transitions. [2021-07-09 17:37:53,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4647 transitions. [2021-07-09 17:37:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:53,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:53,271 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:53,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3788 [2021-07-09 17:37:53,471 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1999195953, now seen corresponding path program 478 times [2021-07-09 17:37:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:53,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479674755] [2021-07-09 17:37:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:53,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:53,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479674755] [2021-07-09 17:37:53,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479674755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557193591] [2021-07-09 17:37:53,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:53,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:53,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:53,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:53,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:53,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:53,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:53,621 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:37:53,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:53,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:53,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:53,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:53,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:53,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:53,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,723 INFO L628 ElimStorePlain]: treesize reduction 65, result has 25.3 percent of original size [2021-07-09 17:37:53,723 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:53,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:53,724 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:173, output treesize:22 [2021-07-09 17:37:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:53,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557193591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:53,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:37:53,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638709884] [2021-07-09 17:37:53,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:53,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:53,764 INFO L87 Difference]: Start difference. First operand 1409 states and 4647 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:54,160 INFO L93 Difference]: Finished difference Result 2117 states and 6771 transitions. [2021-07-09 17:37:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:54,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:54,163 INFO L225 Difference]: With dead ends: 2117 [2021-07-09 17:37:54,163 INFO L226 Difference]: Without dead ends: 2117 [2021-07-09 17:37:54,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-07-09 17:37:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1436. [2021-07-09 17:37:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.318466898954704) internal successors, (4762), 1435 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4762 transitions. [2021-07-09 17:37:54,191 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4762 transitions. Word has length 25 [2021-07-09 17:37:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:54,191 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 4762 transitions. [2021-07-09 17:37:54,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4762 transitions. [2021-07-09 17:37:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:54,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:54,193 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:54,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3791 [2021-07-09 17:37:54,393 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash 146974807, now seen corresponding path program 479 times [2021-07-09 17:37:54,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:54,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551198529] [2021-07-09 17:37:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:54,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551198529] [2021-07-09 17:37:54,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551198529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779888293] [2021-07-09 17:37:54,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:54,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:54,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:54,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:54,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:54,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:54,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:54,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:54,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:37:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:54,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779888293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:54,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:54,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:54,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077060643] [2021-07-09 17:37:54,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:54,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:54,604 INFO L87 Difference]: Start difference. First operand 1436 states and 4762 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:54,854 INFO L93 Difference]: Finished difference Result 2037 states and 6590 transitions. [2021-07-09 17:37:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:54,857 INFO L225 Difference]: With dead ends: 2037 [2021-07-09 17:37:54,857 INFO L226 Difference]: Without dead ends: 2037 [2021-07-09 17:37:54,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-07-09 17:37:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1436. [2021-07-09 17:37:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.318466898954704) internal successors, (4762), 1435 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4762 transitions. [2021-07-09 17:37:54,876 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4762 transitions. Word has length 25 [2021-07-09 17:37:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:54,876 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 4762 transitions. [2021-07-09 17:37:54,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4762 transitions. [2021-07-09 17:37:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:54,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:54,877 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:55,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3795,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,078 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:55,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1758260337, now seen corresponding path program 480 times [2021-07-09 17:37:55,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:55,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684429373] [2021-07-09 17:37:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:55,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:55,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684429373] [2021-07-09 17:37:55,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684429373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19354828] [2021-07-09 17:37:55,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:55,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:55,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:55,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:55,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:55,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:55,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:55,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:55,255 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:55,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19354828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:55,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:55,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592634627] [2021-07-09 17:37:55,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:55,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:55,328 INFO L87 Difference]: Start difference. First operand 1436 states and 4762 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:55,752 INFO L93 Difference]: Finished difference Result 1796 states and 5845 transitions. [2021-07-09 17:37:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:55,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:55,755 INFO L225 Difference]: With dead ends: 1796 [2021-07-09 17:37:55,755 INFO L226 Difference]: Without dead ends: 1766 [2021-07-09 17:37:55,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-07-09 17:37:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1436. [2021-07-09 17:37:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.313588850174216) internal successors, (4755), 1435 states have internal predecessors, (4755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4755 transitions. [2021-07-09 17:37:55,780 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4755 transitions. Word has length 25 [2021-07-09 17:37:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:55,780 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 4755 transitions. [2021-07-09 17:37:55,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4755 transitions. [2021-07-09 17:37:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:55,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:55,782 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:55,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,982 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:55,983 INFO L82 PathProgramCache]: Analyzing trace with hash 653321073, now seen corresponding path program 481 times [2021-07-09 17:37:55,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:55,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305673568] [2021-07-09 17:37:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:56,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:56,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305673568] [2021-07-09 17:37:56,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305673568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905339475] [2021-07-09 17:37:56,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:56,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:56,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:56,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:56,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:56,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:37:56,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:56,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:56,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,178 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-07-09 17:37:56,179 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:37:56,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,179 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-07-09 17:37:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:56,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905339475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:56,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:56,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327261052] [2021-07-09 17:37:56,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:56,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:56,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:56,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:56,196 INFO L87 Difference]: Start difference. First operand 1436 states and 4755 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:56,387 INFO L93 Difference]: Finished difference Result 1993 states and 6446 transitions. [2021-07-09 17:37:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:56,391 INFO L225 Difference]: With dead ends: 1993 [2021-07-09 17:37:56,391 INFO L226 Difference]: Without dead ends: 1993 [2021-07-09 17:37:56,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-07-09 17:37:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1422. [2021-07-09 17:37:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3019000703729766) internal successors, (4692), 1421 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4692 transitions. [2021-07-09 17:37:56,409 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4692 transitions. Word has length 25 [2021-07-09 17:37:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:56,409 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4692 transitions. [2021-07-09 17:37:56,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4692 transitions. [2021-07-09 17:37:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:56,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:56,411 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:56,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3802 [2021-07-09 17:37:56,616 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:56,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:56,616 INFO L82 PathProgramCache]: Analyzing trace with hash 664168749, now seen corresponding path program 482 times [2021-07-09 17:37:56,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:56,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125249276] [2021-07-09 17:37:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:56,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:56,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125249276] [2021-07-09 17:37:56,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125249276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739409629] [2021-07-09 17:37:56,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:56,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:56,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:37:56,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:37:56,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:56,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:56,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:56,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:37:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739409629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:56,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:56,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473262199] [2021-07-09 17:37:56,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:56,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:56,838 INFO L87 Difference]: Start difference. First operand 1422 states and 4692 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:57,181 INFO L93 Difference]: Finished difference Result 1767 states and 5738 transitions. [2021-07-09 17:37:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:57,184 INFO L225 Difference]: With dead ends: 1767 [2021-07-09 17:37:57,184 INFO L226 Difference]: Without dead ends: 1710 [2021-07-09 17:37:57,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-07-09 17:37:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1422. [2021-07-09 17:37:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.2927515833919774) internal successors, (4679), 1421 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4679 transitions. [2021-07-09 17:37:57,200 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4679 transitions. Word has length 25 [2021-07-09 17:37:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:57,200 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4679 transitions. [2021-07-09 17:37:57,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4679 transitions. [2021-07-09 17:37:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:57,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:57,202 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:57,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3804,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:57,403 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash -114804411, now seen corresponding path program 483 times [2021-07-09 17:37:57,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:57,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31185153] [2021-07-09 17:37:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:57,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:57,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31185153] [2021-07-09 17:37:57,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31185153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202532779] [2021-07-09 17:37:57,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:57,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:57,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:57,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:57,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:57,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:57,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:57,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:57,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:57,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:57,591 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:37:57,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:57,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:37:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:57,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202532779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:57,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:37:57,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941700424] [2021-07-09 17:37:57,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:57,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:57,658 INFO L87 Difference]: Start difference. First operand 1422 states and 4679 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:57,930 INFO L93 Difference]: Finished difference Result 2292 states and 7392 transitions. [2021-07-09 17:37:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:57,934 INFO L225 Difference]: With dead ends: 2292 [2021-07-09 17:37:57,934 INFO L226 Difference]: Without dead ends: 2292 [2021-07-09 17:37:57,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-07-09 17:37:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1441. [2021-07-09 17:37:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 3.2944444444444443) internal successors, (4744), 1440 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4744 transitions. [2021-07-09 17:37:57,955 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4744 transitions. Word has length 25 [2021-07-09 17:37:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:57,955 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 4744 transitions. [2021-07-09 17:37:57,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4744 transitions. [2021-07-09 17:37:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:57,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:57,956 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:58,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-07-09 17:37:58,157 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2077902667, now seen corresponding path program 484 times [2021-07-09 17:37:58,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:58,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487566023] [2021-07-09 17:37:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:58,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487566023] [2021-07-09 17:37:58,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487566023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785344866] [2021-07-09 17:37:58,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:58,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:58,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:58,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:58,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:58,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:58,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:58,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:58,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:58,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:58,339 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:37:58,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:58,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:37:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:58,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785344866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:58,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:58,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693954283] [2021-07-09 17:37:58,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:58,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:58,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:58,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:58,436 INFO L87 Difference]: Start difference. First operand 1441 states and 4744 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:58,745 INFO L93 Difference]: Finished difference Result 2152 states and 6944 transitions. [2021-07-09 17:37:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:58,748 INFO L225 Difference]: With dead ends: 2152 [2021-07-09 17:37:58,748 INFO L226 Difference]: Without dead ends: 2152 [2021-07-09 17:37:58,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-09 17:37:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1456. [2021-07-09 17:37:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.2934707903780067) internal successors, (4792), 1455 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4792 transitions. [2021-07-09 17:37:58,768 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4792 transitions. Word has length 25 [2021-07-09 17:37:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:58,769 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 4792 transitions. [2021-07-09 17:37:58,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4792 transitions. [2021-07-09 17:37:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:37:58,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:58,770 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:58,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3813,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:58,971 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:58,971 INFO L82 PathProgramCache]: Analyzing trace with hash 339930851, now seen corresponding path program 485 times [2021-07-09 17:37:58,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:58,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357798605] [2021-07-09 17:37:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:59,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:59,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357798605] [2021-07-09 17:37:59,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357798605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989577535] [2021-07-09 17:37:59,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:59,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:59,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:59,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:37:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:59,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:59,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:59,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:59,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,161 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:37:59,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:59,161 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:37:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:37:59,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989577535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:59,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077477700] [2021-07-09 17:37:59,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:59,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:59,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:59,251 INFO L87 Difference]: Start difference. First operand 1456 states and 4792 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:59,975 INFO L93 Difference]: Finished difference Result 2368 states and 7487 transitions. [2021-07-09 17:37:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:37:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:37:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:59,979 INFO L225 Difference]: With dead ends: 2368 [2021-07-09 17:37:59,979 INFO L226 Difference]: Without dead ends: 2368 [2021-07-09 17:37:59,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-07-09 17:37:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1461. [2021-07-09 17:38:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.3) internal successors, (4818), 1460 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4818 transitions. [2021-07-09 17:38:00,002 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4818 transitions. Word has length 25 [2021-07-09 17:38:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,002 INFO L482 AbstractCegarLoop]: Abstraction has 1461 states and 4818 transitions. [2021-07-09 17:38:00,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4818 transitions. [2021-07-09 17:38:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:00,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,004 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:00,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3818 [2021-07-09 17:38:00,205 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1146543571, now seen corresponding path program 486 times [2021-07-09 17:38:00,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:00,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635643303] [2021-07-09 17:38:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:00,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:00,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635643303] [2021-07-09 17:38:00,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635643303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431102653] [2021-07-09 17:38:00,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:00,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:00,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:00,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:00,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:00,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:00,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:00,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:00,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,382 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:38:00,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:00,382 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:38:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:00,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431102653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:00,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:00,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306425894] [2021-07-09 17:38:00,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:00,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:00,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:00,472 INFO L87 Difference]: Start difference. First operand 1461 states and 4818 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:00,821 INFO L93 Difference]: Finished difference Result 2173 states and 6968 transitions. [2021-07-09 17:38:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:00,825 INFO L225 Difference]: With dead ends: 2173 [2021-07-09 17:38:00,825 INFO L226 Difference]: Without dead ends: 2149 [2021-07-09 17:38:00,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-07-09 17:38:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1439. [2021-07-09 17:38:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.3004172461752432) internal successors, (4746), 1438 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4746 transitions. [2021-07-09 17:38:00,844 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4746 transitions. Word has length 25 [2021-07-09 17:38:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,844 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 4746 transitions. [2021-07-09 17:38:00,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4746 transitions. [2021-07-09 17:38:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:00,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,845 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:01,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3823,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:01,046 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1263015211, now seen corresponding path program 487 times [2021-07-09 17:38:01,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:01,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297442975] [2021-07-09 17:38:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:01,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297442975] [2021-07-09 17:38:01,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297442975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651076560] [2021-07-09 17:38:01,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:01,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:01,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:01,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:01,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:01,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:01,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:01,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:38:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:01,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651076560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:01,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:01,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852514598] [2021-07-09 17:38:01,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:01,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:01,328 INFO L87 Difference]: Start difference. First operand 1439 states and 4746 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:01,812 INFO L93 Difference]: Finished difference Result 1949 states and 6222 transitions. [2021-07-09 17:38:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:01,816 INFO L225 Difference]: With dead ends: 1949 [2021-07-09 17:38:01,816 INFO L226 Difference]: Without dead ends: 1921 [2021-07-09 17:38:01,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-07-09 17:38:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1437. [2021-07-09 17:38:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 3.302924791086351) internal successors, (4743), 1436 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 4743 transitions. [2021-07-09 17:38:01,835 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 4743 transitions. Word has length 25 [2021-07-09 17:38:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:01,835 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 4743 transitions. [2021-07-09 17:38:01,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 4743 transitions. [2021-07-09 17:38:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:01,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:01,837 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:02,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3828 [2021-07-09 17:38:02,037 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1482491947, now seen corresponding path program 488 times [2021-07-09 17:38:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:02,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024782124] [2021-07-09 17:38:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:02,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:02,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024782124] [2021-07-09 17:38:02,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024782124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136139791] [2021-07-09 17:38:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:02,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:02,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:02,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:02,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:02,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:02,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:02,241 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:38:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:02,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136139791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:02,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:02,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431195994] [2021-07-09 17:38:02,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:02,322 INFO L87 Difference]: Start difference. First operand 1437 states and 4743 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:02,961 INFO L93 Difference]: Finished difference Result 1915 states and 6109 transitions. [2021-07-09 17:38:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:02,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:02,964 INFO L225 Difference]: With dead ends: 1915 [2021-07-09 17:38:02,964 INFO L226 Difference]: Without dead ends: 1867 [2021-07-09 17:38:02,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-07-09 17:38:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1445. [2021-07-09 17:38:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.2970914127423825) internal successors, (4761), 1444 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4761 transitions. [2021-07-09 17:38:02,981 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4761 transitions. Word has length 25 [2021-07-09 17:38:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:02,981 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 4761 transitions. [2021-07-09 17:38:02,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4761 transitions. [2021-07-09 17:38:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:02,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:02,983 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:03,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3832,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,183 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:03,184 INFO L82 PathProgramCache]: Analyzing trace with hash -311972667, now seen corresponding path program 489 times [2021-07-09 17:38:03,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:03,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688759118] [2021-07-09 17:38:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:03,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:03,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688759118] [2021-07-09 17:38:03,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688759118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064393354] [2021-07-09 17:38:03,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:03,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:03,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:03,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:03,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,358 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:38:03,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:03,358 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:38:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:03,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064393354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:03,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:03,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181557742] [2021-07-09 17:38:03,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:03,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:03,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:03,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:03,440 INFO L87 Difference]: Start difference. First operand 1445 states and 4761 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:03,760 INFO L93 Difference]: Finished difference Result 2597 states and 8422 transitions. [2021-07-09 17:38:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:03,764 INFO L225 Difference]: With dead ends: 2597 [2021-07-09 17:38:03,764 INFO L226 Difference]: Without dead ends: 2597 [2021-07-09 17:38:03,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-07-09 17:38:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1452. [2021-07-09 17:38:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.297036526533425) internal successors, (4784), 1451 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4784 transitions. [2021-07-09 17:38:03,791 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4784 transitions. Word has length 25 [2021-07-09 17:38:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:03,791 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4784 transitions. [2021-07-09 17:38:03,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4784 transitions. [2021-07-09 17:38:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:03,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:03,793 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:03,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3836 [2021-07-09 17:38:03,993 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1444996367, now seen corresponding path program 490 times [2021-07-09 17:38:03,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:03,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207778989] [2021-07-09 17:38:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:04,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:04,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207778989] [2021-07-09 17:38:04,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207778989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:04,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336458638] [2021-07-09 17:38:04,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:04,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:04,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:04,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:04,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:04,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:04,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:04,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:04,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:04,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:04,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:04,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:04,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:04,209 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:38:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:04,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336458638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:04,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:04,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648318174] [2021-07-09 17:38:04,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:04,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:04,311 INFO L87 Difference]: Start difference. First operand 1452 states and 4784 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:04,779 INFO L93 Difference]: Finished difference Result 2355 states and 7504 transitions. [2021-07-09 17:38:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:04,784 INFO L225 Difference]: With dead ends: 2355 [2021-07-09 17:38:04,784 INFO L226 Difference]: Without dead ends: 2331 [2021-07-09 17:38:04,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-07-09 17:38:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1444. [2021-07-09 17:38:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.2972972972972974) internal successors, (4758), 1443 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4758 transitions. [2021-07-09 17:38:04,807 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4758 transitions. Word has length 25 [2021-07-09 17:38:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:04,807 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4758 transitions. [2021-07-09 17:38:04,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4758 transitions. [2021-07-09 17:38:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:04,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:04,809 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3841,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,010 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1994108981, now seen corresponding path program 491 times [2021-07-09 17:38:05,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262796726] [2021-07-09 17:38:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:05,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:05,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262796726] [2021-07-09 17:38:05,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262796726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840721875] [2021-07-09 17:38:05,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:05,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:05,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:05,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:05,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:05,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:05,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:05,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:05,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:05,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:05,196 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:38:05,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:05,197 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:38:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:05,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840721875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:05,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:05,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264241044] [2021-07-09 17:38:05,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:05,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:05,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:05,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:05,279 INFO L87 Difference]: Start difference. First operand 1444 states and 4758 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:05,658 INFO L93 Difference]: Finished difference Result 2457 states and 7978 transitions. [2021-07-09 17:38:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:05,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:05,662 INFO L225 Difference]: With dead ends: 2457 [2021-07-09 17:38:05,662 INFO L226 Difference]: Without dead ends: 2457 [2021-07-09 17:38:05,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-07-09 17:38:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1459. [2021-07-09 17:38:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.299039780521262) internal successors, (4810), 1458 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4810 transitions. [2021-07-09 17:38:05,683 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4810 transitions. Word has length 25 [2021-07-09 17:38:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:05,683 INFO L482 AbstractCegarLoop]: Abstraction has 1459 states and 4810 transitions. [2021-07-09 17:38:05,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4810 transitions. [2021-07-09 17:38:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:05,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:05,685 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3844,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,885 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1570037071, now seen corresponding path program 492 times [2021-07-09 17:38:05,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485963430] [2021-07-09 17:38:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:05,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485963430] [2021-07-09 17:38:05,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485963430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993123750] [2021-07-09 17:38:05,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:06,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:06,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:06,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:06,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:06,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:06,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:06,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:06,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:06,097 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:38:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:06,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993123750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:06,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:06,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545286388] [2021-07-09 17:38:06,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:06,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:06,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:06,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:06,223 INFO L87 Difference]: Start difference. First operand 1459 states and 4810 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:06,719 INFO L93 Difference]: Finished difference Result 2226 states and 7190 transitions. [2021-07-09 17:38:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:06,723 INFO L225 Difference]: With dead ends: 2226 [2021-07-09 17:38:06,723 INFO L226 Difference]: Without dead ends: 2198 [2021-07-09 17:38:06,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2021-07-09 17:38:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 1459. [2021-07-09 17:38:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.294238683127572) internal successors, (4803), 1458 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4803 transitions. [2021-07-09 17:38:06,743 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4803 transitions. Word has length 25 [2021-07-09 17:38:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:06,743 INFO L482 AbstractCegarLoop]: Abstraction has 1459 states and 4803 transitions. [2021-07-09 17:38:06,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4803 transitions. [2021-07-09 17:38:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:06,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:06,745 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:06,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3849,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:06,945 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash -113356043, now seen corresponding path program 493 times [2021-07-09 17:38:06,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:06,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817633387] [2021-07-09 17:38:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:07,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817633387] [2021-07-09 17:38:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817633387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635116367] [2021-07-09 17:38:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:07,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:07,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:07,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:07,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:07,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:07,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:07,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:07,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:07,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:07,144 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:38:07,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:07,145 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:38:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:07,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635116367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:07,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:07,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042179982] [2021-07-09 17:38:07,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:07,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:07,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:07,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:07,241 INFO L87 Difference]: Start difference. First operand 1459 states and 4803 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:07,766 INFO L93 Difference]: Finished difference Result 2574 states and 8264 transitions. [2021-07-09 17:38:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:07,771 INFO L225 Difference]: With dead ends: 2574 [2021-07-09 17:38:07,771 INFO L226 Difference]: Without dead ends: 2574 [2021-07-09 17:38:07,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-07-09 17:38:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 1472. [2021-07-09 17:38:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.3052345343303875) internal successors, (4862), 1471 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4862 transitions. [2021-07-09 17:38:07,795 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4862 transitions. Word has length 25 [2021-07-09 17:38:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:07,795 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 4862 transitions. [2021-07-09 17:38:07,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4862 transitions. [2021-07-09 17:38:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:07,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:07,797 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:07,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3852,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:07,997 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1208054961, now seen corresponding path program 494 times [2021-07-09 17:38:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:07,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389515640] [2021-07-09 17:38:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:08,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:08,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389515640] [2021-07-09 17:38:08,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389515640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698154051] [2021-07-09 17:38:08,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:08,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:08,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:08,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:08,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:08,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:08,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:08,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:08,213 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:38:08,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:08,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:08,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:08,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:08,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,356 INFO L628 ElimStorePlain]: treesize reduction 59, result has 27.2 percent of original size [2021-07-09 17:38:08,356 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:38:08,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:08,357 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:22 [2021-07-09 17:38:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:08,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698154051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:08,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:08,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912261134] [2021-07-09 17:38:08,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:08,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:08,389 INFO L87 Difference]: Start difference. First operand 1472 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,313 INFO L93 Difference]: Finished difference Result 2395 states and 7666 transitions. [2021-07-09 17:38:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,318 INFO L225 Difference]: With dead ends: 2395 [2021-07-09 17:38:09,318 INFO L226 Difference]: Without dead ends: 2381 [2021-07-09 17:38:09,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-07-09 17:38:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1475. [2021-07-09 17:38:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.3005427408412484) internal successors, (4865), 1474 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4865 transitions. [2021-07-09 17:38:09,341 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4865 transitions. Word has length 25 [2021-07-09 17:38:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,341 INFO L482 AbstractCegarLoop]: Abstraction has 1475 states and 4865 transitions. [2021-07-09 17:38:09,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4865 transitions. [2021-07-09 17:38:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:09,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,343 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3857 [2021-07-09 17:38:09,543 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1473472783, now seen corresponding path program 495 times [2021-07-09 17:38:09,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598020683] [2021-07-09 17:38:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:09,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598020683] [2021-07-09 17:38:09,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598020683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885413268] [2021-07-09 17:38:09,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:09,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:09,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:09,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:09,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:09,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:09,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:09,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:09,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:09,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:09,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:09,777 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-07-09 17:38:09,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:09,778 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:48 [2021-07-09 17:38:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:09,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885413268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:09,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:09,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086984014] [2021-07-09 17:38:09,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:09,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:09,882 INFO L87 Difference]: Start difference. First operand 1475 states and 4865 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:10,670 INFO L93 Difference]: Finished difference Result 2368 states and 7605 transitions. [2021-07-09 17:38:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:10,674 INFO L225 Difference]: With dead ends: 2368 [2021-07-09 17:38:10,674 INFO L226 Difference]: Without dead ends: 2368 [2021-07-09 17:38:10,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 727.1ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-07-09 17:38:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1454. [2021-07-09 17:38:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.30006882312457) internal successors, (4795), 1453 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4795 transitions. [2021-07-09 17:38:10,696 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4795 transitions. Word has length 25 [2021-07-09 17:38:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:10,696 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4795 transitions. [2021-07-09 17:38:10,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4795 transitions. [2021-07-09 17:38:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:10,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:10,698 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:10,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3863,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:10,898 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:10,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1473128211, now seen corresponding path program 496 times [2021-07-09 17:38:10,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:10,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795804575] [2021-07-09 17:38:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:10,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:10,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795804575] [2021-07-09 17:38:10,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795804575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961628028] [2021-07-09 17:38:10,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:10,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:10,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:10,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:11,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:11,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:11,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:11,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,076 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:38:11,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:11,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:38:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:11,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961628028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:11,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:11,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063771560] [2021-07-09 17:38:11,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:11,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:11,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:11,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:11,184 INFO L87 Difference]: Start difference. First operand 1454 states and 4795 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:11,629 INFO L93 Difference]: Finished difference Result 2422 states and 7859 transitions. [2021-07-09 17:38:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:11,633 INFO L225 Difference]: With dead ends: 2422 [2021-07-09 17:38:11,633 INFO L226 Difference]: Without dead ends: 2394 [2021-07-09 17:38:11,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-07-09 17:38:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1433. [2021-07-09 17:38:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.2995810055865924) internal successors, (4725), 1432 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4725 transitions. [2021-07-09 17:38:11,654 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4725 transitions. Word has length 25 [2021-07-09 17:38:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:11,654 INFO L482 AbstractCegarLoop]: Abstraction has 1433 states and 4725 transitions. [2021-07-09 17:38:11,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4725 transitions. [2021-07-09 17:38:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:11,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:11,656 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:11,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3868 [2021-07-09 17:38:11,857 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash -406517609, now seen corresponding path program 497 times [2021-07-09 17:38:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:11,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740386263] [2021-07-09 17:38:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:11,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740386263] [2021-07-09 17:38:11,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740386263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437536037] [2021-07-09 17:38:11,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:11,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:11,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:12,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:12,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:12,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:12,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:12,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:12,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:12,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:12,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:12,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:12,150 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:12,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:12,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:12,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437536037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:12,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:12,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314188424] [2021-07-09 17:38:12,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:12,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:12,356 INFO L87 Difference]: Start difference. First operand 1433 states and 4725 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:13,013 INFO L93 Difference]: Finished difference Result 2057 states and 6683 transitions. [2021-07-09 17:38:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:13,017 INFO L225 Difference]: With dead ends: 2057 [2021-07-09 17:38:13,017 INFO L226 Difference]: Without dead ends: 2057 [2021-07-09 17:38:13,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 582.4ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-07-09 17:38:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1457. [2021-07-09 17:38:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.301510989010989) internal successors, (4807), 1456 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4807 transitions. [2021-07-09 17:38:13,036 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4807 transitions. Word has length 25 [2021-07-09 17:38:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:13,036 INFO L482 AbstractCegarLoop]: Abstraction has 1457 states and 4807 transitions. [2021-07-09 17:38:13,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4807 transitions. [2021-07-09 17:38:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:13,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:13,038 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:13,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:13,238 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:13,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2144489425, now seen corresponding path program 498 times [2021-07-09 17:38:13,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:13,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407958962] [2021-07-09 17:38:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:13,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:13,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407958962] [2021-07-09 17:38:13,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407958962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205603794] [2021-07-09 17:38:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:13,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:13,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:13,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:13,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:13,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:13,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:13,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,549 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:13,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:13,553 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205603794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:13,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:13,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060021276] [2021-07-09 17:38:13,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:13,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:13,753 INFO L87 Difference]: Start difference. First operand 1457 states and 4807 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:14,738 INFO L93 Difference]: Finished difference Result 2264 states and 7202 transitions. [2021-07-09 17:38:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:38:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:14,742 INFO L225 Difference]: With dead ends: 2264 [2021-07-09 17:38:14,742 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 17:38:14,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 932.8ms TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:38:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 17:38:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1462. [2021-07-09 17:38:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-07-09 17:38:14,764 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 25 [2021-07-09 17:38:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:14,764 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-07-09 17:38:14,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-07-09 17:38:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:14,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:14,765 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:14,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3882,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:14,966 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:14,966 INFO L82 PathProgramCache]: Analyzing trace with hash 664003449, now seen corresponding path program 499 times [2021-07-09 17:38:14,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:14,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101824760] [2021-07-09 17:38:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:15,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:15,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101824760] [2021-07-09 17:38:15,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101824760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572095878] [2021-07-09 17:38:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:15,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:15,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:15,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:15,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:15,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:15,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,260 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:15,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:15,263 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:15,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572095878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:15,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:15,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479134733] [2021-07-09 17:38:15,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:15,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:15,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:15,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:15,459 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:16,089 INFO L93 Difference]: Finished difference Result 2066 states and 6674 transitions. [2021-07-09 17:38:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:16,093 INFO L225 Difference]: With dead ends: 2066 [2021-07-09 17:38:16,093 INFO L226 Difference]: Without dead ends: 2042 [2021-07-09 17:38:16,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-07-09 17:38:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1442. [2021-07-09 17:38:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3025676613462873) internal successors, (4759), 1441 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4759 transitions. [2021-07-09 17:38:16,112 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4759 transitions. Word has length 25 [2021-07-09 17:38:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:16,112 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4759 transitions. [2021-07-09 17:38:16,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4759 transitions. [2021-07-09 17:38:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:16,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:16,114 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:16,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3899 [2021-07-09 17:38:16,314 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash -19118351, now seen corresponding path program 500 times [2021-07-09 17:38:16,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:16,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554375168] [2021-07-09 17:38:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:16,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:16,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554375168] [2021-07-09 17:38:16,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554375168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897611956] [2021-07-09 17:38:16,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:16,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:16,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:16,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:16,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:16,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:16,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,665 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:38:16,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:16,668 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:38:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:16,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897611956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:16,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:16,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139147217] [2021-07-09 17:38:16,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:16,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:16,843 INFO L87 Difference]: Start difference. First operand 1442 states and 4759 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:17,393 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-07-09 17:38:17,795 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-07-09 17:38:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:18,078 INFO L93 Difference]: Finished difference Result 1931 states and 6160 transitions. [2021-07-09 17:38:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:18,082 INFO L225 Difference]: With dead ends: 1931 [2021-07-09 17:38:18,082 INFO L226 Difference]: Without dead ends: 1917 [2021-07-09 17:38:18,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1239.0ms TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-07-09 17:38:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1486. [2021-07-09 17:38:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.276094276094276) internal successors, (4865), 1485 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4865 transitions. [2021-07-09 17:38:18,101 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4865 transitions. Word has length 25 [2021-07-09 17:38:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:18,101 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4865 transitions. [2021-07-09 17:38:18,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4865 transitions. [2021-07-09 17:38:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:18,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:18,103 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:18,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-07-09 17:38:18,303 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1757090167, now seen corresponding path program 501 times [2021-07-09 17:38:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:18,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769050031] [2021-07-09 17:38:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:18,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:18,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769050031] [2021-07-09 17:38:18,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769050031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232696086] [2021-07-09 17:38:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:18,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:18,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:18,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:18,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:18,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,615 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:38:18,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:18,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:18,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:18,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:18,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:38:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:18,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232696086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:18,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:18,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850802289] [2021-07-09 17:38:18,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:18,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:18,840 INFO L87 Difference]: Start difference. First operand 1486 states and 4865 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,025 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 17:38:19,540 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-07-09 17:38:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:19,778 INFO L93 Difference]: Finished difference Result 1870 states and 6002 transitions. [2021-07-09 17:38:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:19,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:19,781 INFO L225 Difference]: With dead ends: 1870 [2021-07-09 17:38:19,781 INFO L226 Difference]: Without dead ends: 1830 [2021-07-09 17:38:19,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 975.5ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-07-09 17:38:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1448. [2021-07-09 17:38:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.297857636489288) internal successors, (4772), 1447 states have internal predecessors, (4772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4772 transitions. [2021-07-09 17:38:19,798 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4772 transitions. Word has length 25 [2021-07-09 17:38:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:19,798 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 4772 transitions. [2021-07-09 17:38:19,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4772 transitions. [2021-07-09 17:38:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:19,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:19,800 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:20,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-07-09 17:38:20,000 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:20,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2080974103, now seen corresponding path program 502 times [2021-07-09 17:38:20,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:20,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215383617] [2021-07-09 17:38:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:20,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:20,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215383617] [2021-07-09 17:38:20,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215383617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812904459] [2021-07-09 17:38:20,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:20,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:20,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:20,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:20,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:20,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:20,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:20,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:20,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,308 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:20,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:20,310 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:20,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812904459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:20,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658223605] [2021-07-09 17:38:20,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:20,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:20,507 INFO L87 Difference]: Start difference. First operand 1448 states and 4772 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:21,024 INFO L93 Difference]: Finished difference Result 2038 states and 6626 transitions. [2021-07-09 17:38:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:21,027 INFO L225 Difference]: With dead ends: 2038 [2021-07-09 17:38:21,027 INFO L226 Difference]: Without dead ends: 2038 [2021-07-09 17:38:21,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-07-09 17:38:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1455. [2021-07-09 17:38:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.297799174690509) internal successors, (4795), 1454 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4795 transitions. [2021-07-09 17:38:21,047 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4795 transitions. Word has length 25 [2021-07-09 17:38:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:21,047 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4795 transitions. [2021-07-09 17:38:21,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4795 transitions. [2021-07-09 17:38:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:21,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:21,048 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3949 [2021-07-09 17:38:21,249 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1810877687, now seen corresponding path program 503 times [2021-07-09 17:38:21,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194723236] [2021-07-09 17:38:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:21,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194723236] [2021-07-09 17:38:21,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194723236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311628708] [2021-07-09 17:38:21,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:38:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:21,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:21,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,586 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:38:21,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:21,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:21,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:21,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:21,634 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:38:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:21,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311628708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:21,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:21,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033845929] [2021-07-09 17:38:21,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:21,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:21,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:21,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:21,879 INFO L87 Difference]: Start difference. First operand 1455 states and 4795 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:22,748 INFO L93 Difference]: Finished difference Result 1813 states and 5906 transitions. [2021-07-09 17:38:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,751 INFO L225 Difference]: With dead ends: 1813 [2021-07-09 17:38:22,751 INFO L226 Difference]: Without dead ends: 1797 [2021-07-09 17:38:22,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 908.6ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-07-09 17:38:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1449. [2021-07-09 17:38:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.296961325966851) internal successors, (4774), 1448 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4774 transitions. [2021-07-09 17:38:22,767 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4774 transitions. Word has length 25 [2021-07-09 17:38:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,767 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4774 transitions. [2021-07-09 17:38:22,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4774 transitions. [2021-07-09 17:38:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:22,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,769 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:22,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3958,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:22,969 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:22,970 INFO L82 PathProgramCache]: Analyzing trace with hash 665599791, now seen corresponding path program 504 times [2021-07-09 17:38:22,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:22,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072824473] [2021-07-09 17:38:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:23,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072824473] [2021-07-09 17:38:23,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072824473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704939950] [2021-07-09 17:38:23,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:23,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:23,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:23,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:23,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:23,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:23,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:23,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,295 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:23,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:23,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704939950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:23,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:23,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343145023] [2021-07-09 17:38:23,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:23,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:23,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:23,523 INFO L87 Difference]: Start difference. First operand 1449 states and 4774 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:24,422 INFO L93 Difference]: Finished difference Result 2099 states and 6779 transitions. [2021-07-09 17:38:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:24,426 INFO L225 Difference]: With dead ends: 2099 [2021-07-09 17:38:24,426 INFO L226 Difference]: Without dead ends: 2099 [2021-07-09 17:38:24,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-07-09 17:38:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1464. [2021-07-09 17:38:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 3.307587149692413) internal successors, (4839), 1463 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 4839 transitions. [2021-07-09 17:38:24,445 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 4839 transitions. Word has length 25 [2021-07-09 17:38:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:24,446 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 4839 transitions. [2021-07-09 17:38:24,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 4839 transitions. [2021-07-09 17:38:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:24,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:24,447 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:24,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3973 [2021-07-09 17:38:24,648 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash -429099127, now seen corresponding path program 505 times [2021-07-09 17:38:24,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:24,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354187508] [2021-07-09 17:38:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:24,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:24,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354187508] [2021-07-09 17:38:24,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354187508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394573235] [2021-07-09 17:38:24,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:24,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:24,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:24,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:24,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:24,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:24,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:24,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:24,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:38:25,216 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1727, o_4], 1=[o_0, v_prenex_1726]} [2021-07-09 17:38:25,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:25,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:25,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,268 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-07-09 17:38:25,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:25,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:25,287 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:38:25,287 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1726 vanished before elimination [2021-07-09 17:38:25,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:25,288 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:38:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:25,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394573235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:25,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:25,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219556429] [2021-07-09 17:38:25,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:25,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:25,322 INFO L87 Difference]: Start difference. First operand 1464 states and 4839 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:26,356 INFO L93 Difference]: Finished difference Result 1946 states and 6281 transitions. [2021-07-09 17:38:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:26,359 INFO L225 Difference]: With dead ends: 1946 [2021-07-09 17:38:26,359 INFO L226 Difference]: Without dead ends: 1932 [2021-07-09 17:38:26,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 940.8ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-07-09 17:38:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1473. [2021-07-09 17:38:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 3.301630434782609) internal successors, (4860), 1472 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 4860 transitions. [2021-07-09 17:38:26,378 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 4860 transitions. Word has length 25 [2021-07-09 17:38:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:26,378 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 4860 transitions. [2021-07-09 17:38:26,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 4860 transitions. [2021-07-09 17:38:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:26,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:26,379 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:26,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:26,580 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash -694516949, now seen corresponding path program 506 times [2021-07-09 17:38:26,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:26,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33471395] [2021-07-09 17:38:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:26,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:26,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33471395] [2021-07-09 17:38:26,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33471395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262285497] [2021-07-09 17:38:26,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:26,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:26,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:26,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:26,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,893 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:38:26,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:26,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:26,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:26,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:26,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:38:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:27,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262285497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:27,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:27,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234010115] [2021-07-09 17:38:27,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:27,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:27,166 INFO L87 Difference]: Start difference. First operand 1473 states and 4860 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,542 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-09 17:38:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:28,107 INFO L93 Difference]: Finished difference Result 1885 states and 6134 transitions. [2021-07-09 17:38:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:28,110 INFO L225 Difference]: With dead ends: 1885 [2021-07-09 17:38:28,111 INFO L226 Difference]: Without dead ends: 1885 [2021-07-09 17:38:28,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 893.3ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-07-09 17:38:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1452. [2021-07-09 17:38:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.301171605789111) internal successors, (4790), 1451 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4790 transitions. [2021-07-09 17:38:28,129 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4790 transitions. Word has length 25 [2021-07-09 17:38:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:28,129 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4790 transitions. [2021-07-09 17:38:28,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4790 transitions. [2021-07-09 17:38:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:28,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:28,131 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:28,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,347 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -694172377, now seen corresponding path program 507 times [2021-07-09 17:38:28,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:28,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378808552] [2021-07-09 17:38:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:28,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:28,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378808552] [2021-07-09 17:38:28,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378808552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150697471] [2021-07-09 17:38:28,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:28,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:28,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,630 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:38:28,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:28,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:28,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:28,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:28,667 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:28,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150697471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:28,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:28,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738939621] [2021-07-09 17:38:28,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:28,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:28,901 INFO L87 Difference]: Start difference. First operand 1452 states and 4790 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:29,588 INFO L93 Difference]: Finished difference Result 1995 states and 6469 transitions. [2021-07-09 17:38:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:29,591 INFO L225 Difference]: With dead ends: 1995 [2021-07-09 17:38:29,591 INFO L226 Difference]: Without dead ends: 1967 [2021-07-09 17:38:29,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-09 17:38:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1438. [2021-07-09 17:38:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.2992345163535144) internal successors, (4741), 1437 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4741 transitions. [2021-07-09 17:38:29,610 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4741 transitions. Word has length 25 [2021-07-09 17:38:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:29,610 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4741 transitions. [2021-07-09 17:38:29,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4741 transitions. [2021-07-09 17:38:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:29,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:29,611 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:29,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,827 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1296804293, now seen corresponding path program 508 times [2021-07-09 17:38:29,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:29,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105000904] [2021-07-09 17:38:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:29,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:29,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105000904] [2021-07-09 17:38:29,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105000904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144789209] [2021-07-09 17:38:29,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:29,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:29,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:30,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:30,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:30,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:30,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:30,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:30,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:30,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:30,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:30,139 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:30,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:30,142 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144789209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:30,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:30,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495078658] [2021-07-09 17:38:30,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:30,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:30,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:30,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:30,359 INFO L87 Difference]: Start difference. First operand 1438 states and 4741 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:31,377 INFO L93 Difference]: Finished difference Result 2300 states and 7304 transitions. [2021-07-09 17:38:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:38:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:31,381 INFO L225 Difference]: With dead ends: 2300 [2021-07-09 17:38:31,381 INFO L226 Difference]: Without dead ends: 2300 [2021-07-09 17:38:31,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 905.5ms TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-07-09 17:38:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1452. [2021-07-09 17:38:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.3149552033080636) internal successors, (4810), 1451 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4810 transitions. [2021-07-09 17:38:31,402 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4810 transitions. Word has length 25 [2021-07-09 17:38:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:31,402 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4810 transitions. [2021-07-09 17:38:31,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4810 transitions. [2021-07-09 17:38:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:31,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:31,404 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:31,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-07-09 17:38:31,620 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash -189670129, now seen corresponding path program 509 times [2021-07-09 17:38:31,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:31,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835676723] [2021-07-09 17:38:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:31,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:31,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835676723] [2021-07-09 17:38:31,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835676723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791965483] [2021-07-09 17:38:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:31,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:31,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:31,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:31,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:31,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,892 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:38:31,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:31,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:31,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:31,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:31,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:32,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791965483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:32,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:32,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250615550] [2021-07-09 17:38:32,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:32,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:32,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:32,135 INFO L87 Difference]: Start difference. First operand 1452 states and 4810 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,582 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-09 17:38:32,892 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-07-09 17:38:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:33,294 INFO L93 Difference]: Finished difference Result 2156 states and 6905 transitions. [2021-07-09 17:38:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:38:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:33,299 INFO L225 Difference]: With dead ends: 2156 [2021-07-09 17:38:33,299 INFO L226 Difference]: Without dead ends: 2132 [2021-07-09 17:38:33,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1078.3ms TimeCoverageRelationStatistics Valid=242, Invalid=814, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-07-09 17:38:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1447. [2021-07-09 17:38:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 3.308437067773167) internal successors, (4784), 1446 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 4784 transitions. [2021-07-09 17:38:33,320 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 4784 transitions. Word has length 25 [2021-07-09 17:38:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:33,320 INFO L482 AbstractCegarLoop]: Abstraction has 1447 states and 4784 transitions. [2021-07-09 17:38:33,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 4784 transitions. [2021-07-09 17:38:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:33,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:33,322 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:33,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-07-09 17:38:33,533 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1524789101, now seen corresponding path program 510 times [2021-07-09 17:38:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:33,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050273603] [2021-07-09 17:38:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:33,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:33,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050273603] [2021-07-09 17:38:33,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050273603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142078806] [2021-07-09 17:38:33,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:33,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:33,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:33,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:33,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:33,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:33,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,753 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-07-09 17:38:33,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:33,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:48 [2021-07-09 17:38:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:33,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142078806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:33,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:33,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125881747] [2021-07-09 17:38:33,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:33,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:33,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:33,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:33,891 INFO L87 Difference]: Start difference. First operand 1447 states and 4784 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,388 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-09 17:38:34,570 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-07-09 17:38:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:34,933 INFO L93 Difference]: Finished difference Result 2032 states and 6461 transitions. [2021-07-09 17:38:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:34,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:34,937 INFO L225 Difference]: With dead ends: 2032 [2021-07-09 17:38:34,937 INFO L226 Difference]: Without dead ends: 2006 [2021-07-09 17:38:34,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1015.1ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-07-09 17:38:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1486. [2021-07-09 17:38:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.298989898989899) internal successors, (4899), 1485 states have internal predecessors, (4899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4899 transitions. [2021-07-09 17:38:34,956 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4899 transitions. Word has length 25 [2021-07-09 17:38:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:34,957 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4899 transitions. [2021-07-09 17:38:34,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4899 transitions. [2021-07-09 17:38:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:34,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:34,958 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:35,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:35,174 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:35,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1032206379, now seen corresponding path program 511 times [2021-07-09 17:38:35,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:35,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930254851] [2021-07-09 17:38:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:35,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930254851] [2021-07-09 17:38:35,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930254851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849774471] [2021-07-09 17:38:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:35,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:35,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:35,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:35,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:35,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:35,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:38:35,660 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1750, v_prenex_1752, v_prenex_1754], 1=[o_0, v_prenex_1749, v_prenex_1751, v_prenex_1753]} [2021-07-09 17:38:35,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:35,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:35,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,771 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-07-09 17:38:35,772 INFO L628 ElimStorePlain]: treesize reduction 159, result has 37.9 percent of original size [2021-07-09 17:38:35,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:38:35,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:35,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:35,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,884 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:38:35,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1749 vanished before elimination [2021-07-09 17:38:35,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1751 vanished before elimination [2021-07-09 17:38:35,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1753 vanished before elimination [2021-07-09 17:38:35,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:35,886 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:281, output treesize:47 [2021-07-09 17:38:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:35,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849774471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:35,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313604286] [2021-07-09 17:38:35,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:35,957 INFO L87 Difference]: Start difference. First operand 1486 states and 4899 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:36,710 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-07-09 17:38:37,034 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-07-09 17:38:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,241 INFO L93 Difference]: Finished difference Result 2045 states and 6491 transitions. [2021-07-09 17:38:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,244 INFO L225 Difference]: With dead ends: 2045 [2021-07-09 17:38:37,244 INFO L226 Difference]: Without dead ends: 2013 [2021-07-09 17:38:37,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1245.8ms TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-07-09 17:38:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1474. [2021-07-09 17:38:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.3041412084181943) internal successors, (4867), 1473 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4867 transitions. [2021-07-09 17:38:37,264 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4867 transitions. Word has length 25 [2021-07-09 17:38:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,264 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 4867 transitions. [2021-07-09 17:38:37,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4867 transitions. [2021-07-09 17:38:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:37,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,265 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:37,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-09 17:38:37,466 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1238498629, now seen corresponding path program 512 times [2021-07-09 17:38:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:37,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024453612] [2021-07-09 17:38:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:37,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:37,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024453612] [2021-07-09 17:38:37,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024453612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470308922] [2021-07-09 17:38:37,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:37,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:37,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:37,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:37,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:37,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:37,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:37,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:37,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:37,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:37,645 INFO L628 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2021-07-09 17:38:37,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:37,646 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:77, output treesize:36 [2021-07-09 17:38:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:37,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470308922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:37,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:37,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604708974] [2021-07-09 17:38:37,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:37,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:37,759 INFO L87 Difference]: Start difference. First operand 1474 states and 4867 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:38,452 INFO L93 Difference]: Finished difference Result 2303 states and 7296 transitions. [2021-07-09 17:38:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:38,464 INFO L225 Difference]: With dead ends: 2303 [2021-07-09 17:38:38,464 INFO L226 Difference]: Without dead ends: 2303 [2021-07-09 17:38:38,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-07-09 17:38:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1481. [2021-07-09 17:38:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.3087837837837837) internal successors, (4897), 1480 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 4897 transitions. [2021-07-09 17:38:38,486 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 4897 transitions. Word has length 25 [2021-07-09 17:38:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:38,486 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 4897 transitions. [2021-07-09 17:38:38,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 4897 transitions. [2021-07-09 17:38:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:38,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:38,487 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:38,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,688 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1251502355, now seen corresponding path program 513 times [2021-07-09 17:38:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453586874] [2021-07-09 17:38:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:38,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453586874] [2021-07-09 17:38:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453586874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157243914] [2021-07-09 17:38:38,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:38,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:38,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:38,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:38,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:38,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:38,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:38,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:38,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,895 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-07-09 17:38:38,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:38,896 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:48 [2021-07-09 17:38:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:39,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157243914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:39,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034707327] [2021-07-09 17:38:39,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:39,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:39,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:39,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:39,038 INFO L87 Difference]: Start difference. First operand 1481 states and 4897 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,466 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-09 17:38:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:39,897 INFO L93 Difference]: Finished difference Result 2150 states and 6779 transitions. [2021-07-09 17:38:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:39,901 INFO L225 Difference]: With dead ends: 2150 [2021-07-09 17:38:39,901 INFO L226 Difference]: Without dead ends: 2142 [2021-07-09 17:38:39,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-07-09 17:38:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1476. [2021-07-09 17:38:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3084745762711862) internal successors, (4880), 1475 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4880 transitions. [2021-07-09 17:38:39,929 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4880 transitions. Word has length 25 [2021-07-09 17:38:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:39,929 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4880 transitions. [2021-07-09 17:38:39,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4880 transitions. [2021-07-09 17:38:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:39,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:39,931 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:40,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:40,131 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash -782134125, now seen corresponding path program 514 times [2021-07-09 17:38:40,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:40,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133793025] [2021-07-09 17:38:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:40,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133793025] [2021-07-09 17:38:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133793025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018573153] [2021-07-09 17:38:40,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:40,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:40,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:40,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:40,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:40,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:40,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:40,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:40,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:40,356 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-07-09 17:38:40,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:40,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:40,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:40,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:40,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:40,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:40,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:40,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:40,464 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,514 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-07-09 17:38:40,514 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:38:40,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:40,515 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-07-09 17:38:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:40,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018573153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:40,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515026670] [2021-07-09 17:38:40,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:40,598 INFO L87 Difference]: Start difference. First operand 1476 states and 4880 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:41,259 INFO L93 Difference]: Finished difference Result 2133 states and 6802 transitions. [2021-07-09 17:38:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:41,263 INFO L225 Difference]: With dead ends: 2133 [2021-07-09 17:38:41,263 INFO L226 Difference]: Without dead ends: 2133 [2021-07-09 17:38:41,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-07-09 17:38:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1482. [2021-07-09 17:38:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.313301823092505) internal successors, (4907), 1481 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4907 transitions. [2021-07-09 17:38:41,285 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4907 transitions. Word has length 25 [2021-07-09 17:38:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:41,285 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 4907 transitions. [2021-07-09 17:38:41,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4907 transitions. [2021-07-09 17:38:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:41,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:41,286 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:41,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,487 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash -781789553, now seen corresponding path program 515 times [2021-07-09 17:38:41,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:41,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298039533] [2021-07-09 17:38:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:41,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:41,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298039533] [2021-07-09 17:38:41,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298039533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810822365] [2021-07-09 17:38:41,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:41,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:41,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:41,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:41,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,766 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:38:41,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:41,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:41,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:41,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:41,800 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:41,917 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1761, v_prenex_1760, v_prenex_1762, v_prenex_1764], 1=[o_0, v_prenex_1759, v_prenex_1763]} [2021-07-09 17:38:41,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:41,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:41,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,035 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 17:38:42,035 INFO L628 ElimStorePlain]: treesize reduction 119, result has 48.9 percent of original size [2021-07-09 17:38:42,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:42,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:42,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:42,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:42,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:42,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1762 vanished before elimination [2021-07-09 17:38:42,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:42,128 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:42,163 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:38:42,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:38:42,167 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:42,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:42,201 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1763 vanished before elimination [2021-07-09 17:38:42,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:38:42,203 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 11 variables, input treesize:243, output treesize:56 [2021-07-09 17:38:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:42,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810822365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:42,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:42,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:42,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230591760] [2021-07-09 17:38:42,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:42,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:42,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:42,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:42,301 INFO L87 Difference]: Start difference. First operand 1482 states and 4907 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:42,960 INFO L93 Difference]: Finished difference Result 2186 states and 6986 transitions. [2021-07-09 17:38:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:42,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:42,964 INFO L225 Difference]: With dead ends: 2186 [2021-07-09 17:38:42,964 INFO L226 Difference]: Without dead ends: 2158 [2021-07-09 17:38:42,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-07-09 17:38:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1475. [2021-07-09 17:38:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.3100407055630936) internal successors, (4879), 1474 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4879 transitions. [2021-07-09 17:38:42,984 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4879 transitions. Word has length 25 [2021-07-09 17:38:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:42,984 INFO L482 AbstractCegarLoop]: Abstraction has 1475 states and 4879 transitions. [2021-07-09 17:38:42,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4879 transitions. [2021-07-09 17:38:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:42,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:42,986 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:43,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:43,187 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:43,187 INFO L82 PathProgramCache]: Analyzing trace with hash -956026295, now seen corresponding path program 516 times [2021-07-09 17:38:43,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:43,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758416651] [2021-07-09 17:38:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:43,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:43,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758416651] [2021-07-09 17:38:43,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758416651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625912712] [2021-07-09 17:38:43,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:43,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:43,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:43,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:43,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:43,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:43,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:43,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:43,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:43,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:43,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:43,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:43,545 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:38:43,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:43,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:38:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625912712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:43,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895662428] [2021-07-09 17:38:43,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:43,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:43,739 INFO L87 Difference]: Start difference. First operand 1475 states and 4879 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,398 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-09 17:38:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:44,667 INFO L93 Difference]: Finished difference Result 1931 states and 6232 transitions. [2021-07-09 17:38:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:44,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:44,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:44,671 INFO L225 Difference]: With dead ends: 1931 [2021-07-09 17:38:44,671 INFO L226 Difference]: Without dead ends: 1907 [2021-07-09 17:38:44,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 949.9ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-07-09 17:38:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1465. [2021-07-09 17:38:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.306693989071038) internal successors, (4841), 1464 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4841 transitions. [2021-07-09 17:38:44,689 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4841 transitions. Word has length 25 [2021-07-09 17:38:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:44,689 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4841 transitions. [2021-07-09 17:38:44,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4841 transitions. [2021-07-09 17:38:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:44,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:44,691 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:44,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,891 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:44,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1836299831, now seen corresponding path program 517 times [2021-07-09 17:38:44,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:44,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237307948] [2021-07-09 17:38:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:44,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:44,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237307948] [2021-07-09 17:38:44,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237307948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458088699] [2021-07-09 17:38:44,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:45,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:45,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:45,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:45,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:45,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:45,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:45,212 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-07-09 17:38:45,374 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1779, o_4, v_prenex_1775, v_prenex_1777], 1=[o_0, v_prenex_1774, v_prenex_1776, v_prenex_1778]} [2021-07-09 17:38:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:45,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:45,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,513 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-07-09 17:38:45,513 INFO L628 ElimStorePlain]: treesize reduction 139, result has 48.7 percent of original size [2021-07-09 17:38:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-07-09 17:38:45,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:45,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:45,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:45,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:45,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:45,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,702 INFO L628 ElimStorePlain]: treesize reduction 19, result has 78.9 percent of original size [2021-07-09 17:38:45,702 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:38:45,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1774 vanished before elimination [2021-07-09 17:38:45,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1776 vanished before elimination [2021-07-09 17:38:45,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1778 vanished before elimination [2021-07-09 17:38:45,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:45,704 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:281, output treesize:47 [2021-07-09 17:38:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:45,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458088699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:45,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:45,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209023145] [2021-07-09 17:38:45,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:45,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:45,810 INFO L87 Difference]: Start difference. First operand 1465 states and 4841 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,311 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-07-09 17:38:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:46,636 INFO L93 Difference]: Finished difference Result 1968 states and 6366 transitions. [2021-07-09 17:38:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:46,640 INFO L225 Difference]: With dead ends: 1968 [2021-07-09 17:38:46,640 INFO L226 Difference]: Without dead ends: 1968 [2021-07-09 17:38:46,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 824.7ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-07-09 17:38:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1446. [2021-07-09 17:38:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3044982698961936) internal successors, (4775), 1445 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4775 transitions. [2021-07-09 17:38:46,658 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4775 transitions. Word has length 25 [2021-07-09 17:38:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:46,659 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4775 transitions. [2021-07-09 17:38:46,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4775 transitions. [2021-07-09 17:38:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:46,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:46,660 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:46,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4138,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:46,861 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1127075817, now seen corresponding path program 518 times [2021-07-09 17:38:46,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:46,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95065943] [2021-07-09 17:38:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:46,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:46,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95065943] [2021-07-09 17:38:46,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95065943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:46,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84956068] [2021-07-09 17:38:46,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:46,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:46,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:46,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:47,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:47,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:47,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:47,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:47,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:47,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,161 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:47,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:47,164 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:47,291 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1785, v_prenex_1787, v_prenex_1786, v_prenex_1789], 1=[o_0, v_prenex_1784, v_prenex_1788]} [2021-07-09 17:38:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:47,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:47,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,409 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 17:38:47,409 INFO L628 ElimStorePlain]: treesize reduction 119, result has 48.9 percent of original size [2021-07-09 17:38:47,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:47,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:47,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:47,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:47,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:47,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1786 vanished before elimination [2021-07-09 17:38:47,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:47,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:47,537 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:38:47,538 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1784 vanished before elimination [2021-07-09 17:38:47,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:38:47,541 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:47,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:47,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:38:47,577 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 11 variables, input treesize:243, output treesize:56 [2021-07-09 17:38:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:47,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84956068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:47,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:47,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231730142] [2021-07-09 17:38:47,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:47,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:47,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:47,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:47,648 INFO L87 Difference]: Start difference. First operand 1446 states and 4775 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:48,452 INFO L93 Difference]: Finished difference Result 2109 states and 6698 transitions. [2021-07-09 17:38:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:48,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:48,455 INFO L225 Difference]: With dead ends: 2109 [2021-07-09 17:38:48,455 INFO L226 Difference]: Without dead ends: 2067 [2021-07-09 17:38:48,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 789.8ms TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-07-09 17:38:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1456. [2021-07-09 17:38:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.294845360824742) internal successors, (4794), 1455 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4794 transitions. [2021-07-09 17:38:48,475 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4794 transitions. Word has length 25 [2021-07-09 17:38:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:48,475 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 4794 transitions. [2021-07-09 17:38:48,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4794 transitions. [2021-07-09 17:38:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:48,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:48,477 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:48,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4151 [2021-07-09 17:38:48,677 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1267503977, now seen corresponding path program 519 times [2021-07-09 17:38:48,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:48,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270377118] [2021-07-09 17:38:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:48,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:48,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270377118] [2021-07-09 17:38:48,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270377118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381506310] [2021-07-09 17:38:48,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:48,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:48,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:48,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:48,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:48,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:48,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:48,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:48,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:48,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:48,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:48,970 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:38:48,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:48,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:56 [2021-07-09 17:38:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:49,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381506310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:49,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:49,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228201258] [2021-07-09 17:38:49,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:49,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:49,155 INFO L87 Difference]: Start difference. First operand 1456 states and 4794 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:49,901 INFO L93 Difference]: Finished difference Result 2044 states and 6553 transitions. [2021-07-09 17:38:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:49,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:49,905 INFO L225 Difference]: With dead ends: 2044 [2021-07-09 17:38:49,905 INFO L226 Difference]: Without dead ends: 2008 [2021-07-09 17:38:49,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-07-09 17:38:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1439. [2021-07-09 17:38:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.3025034770514603) internal successors, (4749), 1438 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4749 transitions. [2021-07-09 17:38:49,924 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4749 transitions. Word has length 25 [2021-07-09 17:38:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:49,924 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 4749 transitions. [2021-07-09 17:38:49,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4749 transitions. [2021-07-09 17:38:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:49,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:49,925 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:50,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4161,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:50,126 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1324347589, now seen corresponding path program 520 times [2021-07-09 17:38:50,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:50,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450792750] [2021-07-09 17:38:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:50,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:50,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450792750] [2021-07-09 17:38:50,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450792750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721092225] [2021-07-09 17:38:50,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:50,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:50,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:50,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:50,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:50,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:50,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:50,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:50,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:50,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:50,292 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:38:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:50,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721092225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:50,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:38:50,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342989221] [2021-07-09 17:38:50,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:50,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:50,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:50,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:50,332 INFO L87 Difference]: Start difference. First operand 1439 states and 4749 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:50,530 INFO L93 Difference]: Finished difference Result 2151 states and 7011 transitions. [2021-07-09 17:38:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:50,534 INFO L225 Difference]: With dead ends: 2151 [2021-07-09 17:38:50,534 INFO L226 Difference]: Without dead ends: 2151 [2021-07-09 17:38:50,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-07-09 17:38:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1436. [2021-07-09 17:38:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.3010452961672474) internal successors, (4737), 1435 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4737 transitions. [2021-07-09 17:38:50,554 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4737 transitions. Word has length 25 [2021-07-09 17:38:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:50,554 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 4737 transitions. [2021-07-09 17:38:50,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4737 transitions. [2021-07-09 17:38:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:50,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:50,556 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:50,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4183 [2021-07-09 17:38:50,761 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash -357788725, now seen corresponding path program 521 times [2021-07-09 17:38:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665132084] [2021-07-09 17:38:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:50,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665132084] [2021-07-09 17:38:50,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665132084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132478797] [2021-07-09 17:38:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:50,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:50,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:50,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:50,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:50,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:50,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:50,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:50,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:50,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:50,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:38:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:50,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132478797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:50,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:38:50,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836988591] [2021-07-09 17:38:50,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:50,984 INFO L87 Difference]: Start difference. First operand 1436 states and 4737 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:51,249 INFO L93 Difference]: Finished difference Result 2160 states and 7035 transitions. [2021-07-09 17:38:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:51,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:51,252 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 17:38:51,252 INFO L226 Difference]: Without dead ends: 2160 [2021-07-09 17:38:51,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-07-09 17:38:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1436. [2021-07-09 17:38:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.2982578397212543) internal successors, (4733), 1435 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4733 transitions. [2021-07-09 17:38:51,273 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4733 transitions. Word has length 25 [2021-07-09 17:38:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:51,273 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 4733 transitions. [2021-07-09 17:38:51,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4733 transitions. [2021-07-09 17:38:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:51,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:51,275 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:51,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4186,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:51,475 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:51,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1522964213, now seen corresponding path program 522 times [2021-07-09 17:38:51,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:51,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911102414] [2021-07-09 17:38:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:51,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:51,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911102414] [2021-07-09 17:38:51,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911102414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087424068] [2021-07-09 17:38:51,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:51,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:51,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:51,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:51,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:51,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:51,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:51,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:51,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:38:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:51,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087424068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:51,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440185765] [2021-07-09 17:38:51,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:51,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:51,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:51,719 INFO L87 Difference]: Start difference. First operand 1436 states and 4733 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:52,260 INFO L93 Difference]: Finished difference Result 2185 states and 7076 transitions. [2021-07-09 17:38:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:52,264 INFO L225 Difference]: With dead ends: 2185 [2021-07-09 17:38:52,264 INFO L226 Difference]: Without dead ends: 2185 [2021-07-09 17:38:52,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-07-09 17:38:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 1438. [2021-07-09 17:38:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.2971468336812806) internal successors, (4738), 1437 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4738 transitions. [2021-07-09 17:38:52,286 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4738 transitions. Word has length 25 [2021-07-09 17:38:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:52,286 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4738 transitions. [2021-07-09 17:38:52,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4738 transitions. [2021-07-09 17:38:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:52,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:52,288 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:52,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-07-09 17:38:52,489 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash 162847473, now seen corresponding path program 523 times [2021-07-09 17:38:52,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:52,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587586512] [2021-07-09 17:38:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:52,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:52,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587586512] [2021-07-09 17:38:52,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587586512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754680602] [2021-07-09 17:38:52,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:52,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:52,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:52,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:52,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:52,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-07-09 17:38:52,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:52,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:52,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:52,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:52,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:52,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:52,787 INFO L628 ElimStorePlain]: treesize reduction 47, result has 31.9 percent of original size [2021-07-09 17:38:52,788 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:38:52,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:52,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:22 [2021-07-09 17:38:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:52,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754680602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:52,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:52,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400882683] [2021-07-09 17:38:52,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:52,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:52,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:52,828 INFO L87 Difference]: Start difference. First operand 1438 states and 4738 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:53,143 INFO L93 Difference]: Finished difference Result 1939 states and 6330 transitions. [2021-07-09 17:38:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:53,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:53,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:53,147 INFO L225 Difference]: With dead ends: 1939 [2021-07-09 17:38:53,147 INFO L226 Difference]: Without dead ends: 1939 [2021-07-09 17:38:53,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-07-09 17:38:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1435. [2021-07-09 17:38:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.294979079497908) internal successors, (4725), 1434 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4725 transitions. [2021-07-09 17:38:53,165 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4725 transitions. Word has length 25 [2021-07-09 17:38:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:53,165 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4725 transitions. [2021-07-09 17:38:53,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4725 transitions. [2021-07-09 17:38:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:53,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:53,167 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:53,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4193,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:53,367 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash 163192045, now seen corresponding path program 524 times [2021-07-09 17:38:53,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:53,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509193960] [2021-07-09 17:38:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:53,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:53,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509193960] [2021-07-09 17:38:53,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509193960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196803382] [2021-07-09 17:38:53,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:53,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:53,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:53,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:53,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:53,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:53,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:53,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:53,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:53,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:53,535 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-07-09 17:38:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:53,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196803382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:53,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600992027] [2021-07-09 17:38:53,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:53,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:53,609 INFO L87 Difference]: Start difference. First operand 1435 states and 4725 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:53,962 INFO L93 Difference]: Finished difference Result 2113 states and 6875 transitions. [2021-07-09 17:38:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:53,966 INFO L225 Difference]: With dead ends: 2113 [2021-07-09 17:38:53,966 INFO L226 Difference]: Without dead ends: 2104 [2021-07-09 17:38:53,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-09 17:38:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1419. [2021-07-09 17:38:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.2954866008462624) internal successors, (4673), 1418 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4673 transitions. [2021-07-09 17:38:53,985 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4673 transitions. Word has length 25 [2021-07-09 17:38:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:53,986 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4673 transitions. [2021-07-09 17:38:53,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4673 transitions. [2021-07-09 17:38:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:53,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:53,987 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:54,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4197 [2021-07-09 17:38:54,188 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -839366203, now seen corresponding path program 525 times [2021-07-09 17:38:54,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:54,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820166890] [2021-07-09 17:38:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:54,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820166890] [2021-07-09 17:38:54,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820166890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940240581] [2021-07-09 17:38:54,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:54,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:54,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:54,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:54,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:54,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:54,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:54,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:54,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:54,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:38:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:54,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940240581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:54,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:38:54,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570965990] [2021-07-09 17:38:54,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:54,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:54,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:54,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:54,405 INFO L87 Difference]: Start difference. First operand 1419 states and 4673 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:54,600 INFO L93 Difference]: Finished difference Result 1737 states and 5676 transitions. [2021-07-09 17:38:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:54,603 INFO L225 Difference]: With dead ends: 1737 [2021-07-09 17:38:54,604 INFO L226 Difference]: Without dead ends: 1737 [2021-07-09 17:38:54,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-07-09 17:38:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1432. [2021-07-09 17:38:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.29769392033543) internal successors, (4719), 1431 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4719 transitions. [2021-07-09 17:38:54,622 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4719 transitions. Word has length 25 [2021-07-09 17:38:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:54,622 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 4719 transitions. [2021-07-09 17:38:54,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4719 transitions. [2021-07-09 17:38:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:54,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:54,624 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:54,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,825 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash -415294293, now seen corresponding path program 526 times [2021-07-09 17:38:54,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:54,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152830333] [2021-07-09 17:38:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:54,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:54,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152830333] [2021-07-09 17:38:54,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152830333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013334308] [2021-07-09 17:38:54,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:54,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:55,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:55,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:55,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:55,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:55,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:38:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:55,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013334308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:55,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:38:55,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713808415] [2021-07-09 17:38:55,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:55,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:55,123 INFO L87 Difference]: Start difference. First operand 1432 states and 4719 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:55,336 INFO L93 Difference]: Finished difference Result 1673 states and 5463 transitions. [2021-07-09 17:38:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:55,339 INFO L225 Difference]: With dead ends: 1673 [2021-07-09 17:38:55,339 INFO L226 Difference]: Without dead ends: 1645 [2021-07-09 17:38:55,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-07-09 17:38:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1426. [2021-07-09 17:38:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.294035087719298) internal successors, (4694), 1425 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4694 transitions. [2021-07-09 17:38:55,356 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4694 transitions. Word has length 25 [2021-07-09 17:38:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:55,356 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4694 transitions. [2021-07-09 17:38:55,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4694 transitions. [2021-07-09 17:38:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:55,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:55,357 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:55,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4204,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:55,558 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:55,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1915722061, now seen corresponding path program 527 times [2021-07-09 17:38:55,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:55,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290088084] [2021-07-09 17:38:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:55,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:55,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290088084] [2021-07-09 17:38:55,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290088084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956447619] [2021-07-09 17:38:55,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:55,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:55,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:55,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:55,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:55,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:55,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:55,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:55,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:55,735 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:38:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:55,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956447619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:55,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:55,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734151282] [2021-07-09 17:38:55,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:55,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:55,803 INFO L87 Difference]: Start difference. First operand 1426 states and 4694 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:56,114 INFO L93 Difference]: Finished difference Result 1757 states and 5743 transitions. [2021-07-09 17:38:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:56,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:56,117 INFO L225 Difference]: With dead ends: 1757 [2021-07-09 17:38:56,117 INFO L226 Difference]: Without dead ends: 1757 [2021-07-09 17:38:56,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-07-09 17:38:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1426. [2021-07-09 17:38:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.294035087719298) internal successors, (4694), 1425 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4694 transitions. [2021-07-09 17:38:56,134 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4694 transitions. Word has length 25 [2021-07-09 17:38:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:56,134 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4694 transitions. [2021-07-09 17:38:56,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4694 transitions. [2021-07-09 17:38:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:56,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:56,136 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:56,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4207 [2021-07-09 17:38:56,337 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash -53312183, now seen corresponding path program 528 times [2021-07-09 17:38:56,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:56,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651160587] [2021-07-09 17:38:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:56,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651160587] [2021-07-09 17:38:56,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651160587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289565012] [2021-07-09 17:38:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:56,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:56,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:56,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:56,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:56,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:56,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:56,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:56,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:38:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:56,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:56,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:56,630 INFO L628 ElimStorePlain]: treesize reduction 67, result has 37.4 percent of original size [2021-07-09 17:38:56,630 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:38:56,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:56,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:56,644 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1795 vanished before elimination [2021-07-09 17:38:56,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:56,644 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:22 [2021-07-09 17:38:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:56,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289565012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:56,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:56,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47019017] [2021-07-09 17:38:56,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:56,676 INFO L87 Difference]: Start difference. First operand 1426 states and 4694 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:56,982 INFO L93 Difference]: Finished difference Result 1754 states and 5689 transitions. [2021-07-09 17:38:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:56,985 INFO L225 Difference]: With dead ends: 1754 [2021-07-09 17:38:56,985 INFO L226 Difference]: Without dead ends: 1740 [2021-07-09 17:38:56,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-07-09 17:38:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1454. [2021-07-09 17:38:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.293186510667584) internal successors, (4785), 1453 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4785 transitions. [2021-07-09 17:38:57,003 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4785 transitions. Word has length 25 [2021-07-09 17:38:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:57,003 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4785 transitions. [2021-07-09 17:38:57,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4785 transitions. [2021-07-09 17:38:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:57,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:57,005 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:57,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4216,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,205 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash -318730005, now seen corresponding path program 529 times [2021-07-09 17:38:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:57,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19784078] [2021-07-09 17:38:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:57,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:57,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19784078] [2021-07-09 17:38:57,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19784078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329848841] [2021-07-09 17:38:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:57,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:57,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:57,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:57,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:57,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:57,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:57,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:38:57,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:57,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:57,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:57,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:57,486 INFO L628 ElimStorePlain]: treesize reduction 78, result has 27.1 percent of original size [2021-07-09 17:38:57,487 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:38:57,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:57,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:57,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:57,501 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1797 vanished before elimination [2021-07-09 17:38:57,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:57,502 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:22 [2021-07-09 17:38:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:57,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329848841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:57,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:57,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681046446] [2021-07-09 17:38:57,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:57,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:57,543 INFO L87 Difference]: Start difference. First operand 1454 states and 4785 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:57,787 INFO L93 Difference]: Finished difference Result 1693 states and 5542 transitions. [2021-07-09 17:38:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:57,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:57,790 INFO L225 Difference]: With dead ends: 1693 [2021-07-09 17:38:57,790 INFO L226 Difference]: Without dead ends: 1693 [2021-07-09 17:38:57,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-07-09 17:38:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1419. [2021-07-09 17:38:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.2954866008462624) internal successors, (4673), 1418 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4673 transitions. [2021-07-09 17:38:57,807 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4673 transitions. Word has length 25 [2021-07-09 17:38:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:57,807 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4673 transitions. [2021-07-09 17:38:57,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4673 transitions. [2021-07-09 17:38:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:57,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:57,809 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:58,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4220,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,009 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:58,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1146796441, now seen corresponding path program 530 times [2021-07-09 17:38:58,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:58,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060519561] [2021-07-09 17:38:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:58,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:58,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060519561] [2021-07-09 17:38:58,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060519561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399630905] [2021-07-09 17:38:58,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:58,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:58,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:58,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:58,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:58,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-07-09 17:38:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:58,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399630905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:58,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:58,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973542143] [2021-07-09 17:38:58,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:58,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:58,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:58,268 INFO L87 Difference]: Start difference. First operand 1419 states and 4673 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:58,578 INFO L93 Difference]: Finished difference Result 1755 states and 5684 transitions. [2021-07-09 17:38:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:58,581 INFO L225 Difference]: With dead ends: 1755 [2021-07-09 17:38:58,581 INFO L226 Difference]: Without dead ends: 1755 [2021-07-09 17:38:58,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-07-09 17:38:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1419. [2021-07-09 17:38:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.2954866008462624) internal successors, (4673), 1418 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4673 transitions. [2021-07-09 17:38:58,598 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4673 transitions. Word has length 25 [2021-07-09 17:38:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:58,598 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4673 transitions. [2021-07-09 17:38:58,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4673 transitions. [2021-07-09 17:38:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:58,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:58,600 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:58,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4223,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,800 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1788398687, now seen corresponding path program 531 times [2021-07-09 17:38:58,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:58,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463792857] [2021-07-09 17:38:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:58,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:58,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463792857] [2021-07-09 17:38:58,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463792857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218550379] [2021-07-09 17:38:58,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:58,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:58,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:58,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:58,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:58,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:58,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:58,982 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-07-09 17:38:59,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:59,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:59,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:59,060 INFO L628 ElimStorePlain]: treesize reduction 64, result has 40.2 percent of original size [2021-07-09 17:38:59,060 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:38:59,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:59,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:59,074 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1799 vanished before elimination [2021-07-09 17:38:59,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:59,075 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:25 [2021-07-09 17:38:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:59,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218550379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:59,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:38:59,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325121627] [2021-07-09 17:38:59,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:59,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:59,106 INFO L87 Difference]: Start difference. First operand 1419 states and 4673 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:59,396 INFO L93 Difference]: Finished difference Result 1752 states and 5652 transitions. [2021-07-09 17:38:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:38:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:59,399 INFO L225 Difference]: With dead ends: 1752 [2021-07-09 17:38:59,400 INFO L226 Difference]: Without dead ends: 1737 [2021-07-09 17:38:59,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-07-09 17:38:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1412. [2021-07-09 17:38:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.2919914953933382) internal successors, (4645), 1411 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4645 transitions. [2021-07-09 17:38:59,416 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4645 transitions. Word has length 25 [2021-07-09 17:38:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:59,416 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4645 transitions. [2021-07-09 17:38:59,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4645 transitions. [2021-07-09 17:38:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:38:59,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:59,418 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:59,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4228,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,619 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:59,619 INFO L82 PathProgramCache]: Analyzing trace with hash -360742421, now seen corresponding path program 532 times [2021-07-09 17:38:59,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:59,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595245003] [2021-07-09 17:38:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:59,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595245003] [2021-07-09 17:38:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595245003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496466874] [2021-07-09 17:38:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:59,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:59,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:59,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-07-09 17:38:59,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:59,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:38:59,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:59,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:59,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-07-09 17:38:59,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:59,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:59,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,869 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-07-09 17:38:59,869 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:38:59,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,870 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-07-09 17:38:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:38:59,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496466874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:59,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:59,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334947920] [2021-07-09 17:38:59,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:59,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:59,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:59,888 INFO L87 Difference]: Start difference. First operand 1412 states and 4645 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:00,082 INFO L93 Difference]: Finished difference Result 1722 states and 5612 transitions. [2021-07-09 17:39:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:00,085 INFO L225 Difference]: With dead ends: 1722 [2021-07-09 17:39:00,085 INFO L226 Difference]: Without dead ends: 1722 [2021-07-09 17:39:00,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:39:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-07-09 17:39:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1412. [2021-07-09 17:39:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.2919914953933382) internal successors, (4645), 1411 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4645 transitions. [2021-07-09 17:39:00,102 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4645 transitions. Word has length 25 [2021-07-09 17:39:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:00,102 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4645 transitions. [2021-07-09 17:39:00,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4645 transitions. [2021-07-09 17:39:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:00,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:00,103 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:00,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4232 [2021-07-09 17:39:00,304 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1250543109, now seen corresponding path program 533 times [2021-07-09 17:39:00,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:00,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171617168] [2021-07-09 17:39:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:00,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:00,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171617168] [2021-07-09 17:39:00,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171617168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560987266] [2021-07-09 17:39:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:00,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:00,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:39:00,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:39:00,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:00,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:00,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-07-09 17:39:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:00,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560987266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:00,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:39:00,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540699649] [2021-07-09 17:39:00,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:39:00,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:00,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:39:00,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:00,548 INFO L87 Difference]: Start difference. First operand 1412 states and 4645 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:00,800 INFO L93 Difference]: Finished difference Result 1656 states and 5396 transitions. [2021-07-09 17:39:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:00,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:00,803 INFO L225 Difference]: With dead ends: 1656 [2021-07-09 17:39:00,803 INFO L226 Difference]: Without dead ends: 1626 [2021-07-09 17:39:00,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-07-09 17:39:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1412. [2021-07-09 17:39:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.2870304748405386) internal successors, (4638), 1411 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4638 transitions. [2021-07-09 17:39:00,819 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4638 transitions. Word has length 25 [2021-07-09 17:39:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:00,819 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4638 transitions. [2021-07-09 17:39:00,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4638 transitions. [2021-07-09 17:39:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:00,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:00,821 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:01,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,021 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1169520019, now seen corresponding path program 534 times [2021-07-09 17:39:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:01,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962301437] [2021-07-09 17:39:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:01,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:01,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962301437] [2021-07-09 17:39:01,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962301437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115992678] [2021-07-09 17:39:01,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:01,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:01,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:01,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,338 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:01,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:01,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:01,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:01,377 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:01,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115992678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:01,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145904414] [2021-07-09 17:39:01,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:01,531 INFO L87 Difference]: Start difference. First operand 1412 states and 4638 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:01,941 INFO L93 Difference]: Finished difference Result 1685 states and 5476 transitions. [2021-07-09 17:39:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:01,944 INFO L225 Difference]: With dead ends: 1685 [2021-07-09 17:39:01,944 INFO L226 Difference]: Without dead ends: 1685 [2021-07-09 17:39:01,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-07-09 17:39:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1434. [2021-07-09 17:39:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.286113049546406) internal successors, (4709), 1433 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4709 transitions. [2021-07-09 17:39:01,961 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4709 transitions. Word has length 25 [2021-07-09 17:39:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:01,961 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 4709 transitions. [2021-07-09 17:39:01,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4709 transitions. [2021-07-09 17:39:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:01,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:01,963 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:02,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4238,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:02,163 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1387475461, now seen corresponding path program 535 times [2021-07-09 17:39:02,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:02,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969343339] [2021-07-09 17:39:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:02,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:02,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969343339] [2021-07-09 17:39:02,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969343339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323594636] [2021-07-09 17:39:02,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:02,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:02,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:02,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:02,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:02,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:02,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,506 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:39:02,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:02,509 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:02,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323594636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:02,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:02,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97633840] [2021-07-09 17:39:02,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:02,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:02,683 INFO L87 Difference]: Start difference. First operand 1434 states and 4709 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:03,435 INFO L93 Difference]: Finished difference Result 1877 states and 5950 transitions. [2021-07-09 17:39:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:39:03,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:03,438 INFO L225 Difference]: With dead ends: 1877 [2021-07-09 17:39:03,438 INFO L226 Difference]: Without dead ends: 1877 [2021-07-09 17:39:03,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-07-09 17:39:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1439. [2021-07-09 17:39:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.2927677329624476) internal successors, (4735), 1438 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4735 transitions. [2021-07-09 17:39:03,457 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4735 transitions. Word has length 25 [2021-07-09 17:39:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:03,458 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 4735 transitions. [2021-07-09 17:39:03,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4735 transitions. [2021-07-09 17:39:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:03,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:03,459 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:03,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,536 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:03,675 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:03,675 INFO L82 PathProgramCache]: Analyzing trace with hash -98998961, now seen corresponding path program 536 times [2021-07-09 17:39:03,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:03,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931040743] [2021-07-09 17:39:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:03,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:03,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931040743] [2021-07-09 17:39:03,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931040743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108625991] [2021-07-09 17:39:03,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:03,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:03,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:03,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:03,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:03,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:03,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,988 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:03,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:03,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:04,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:04,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:04,153 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1813, o_4], 1=[o_0, v_prenex_1812]} [2021-07-09 17:39:04,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:04,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:04,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,206 INFO L628 ElimStorePlain]: treesize reduction 76, result has 38.2 percent of original size [2021-07-09 17:39:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:04,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:04,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:04,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:39:04,230 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:04,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:04,245 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1812 vanished before elimination [2021-07-09 17:39:04,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:04,247 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:04,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108625991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:04,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:04,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425732964] [2021-07-09 17:39:04,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:04,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:04,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:04,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:04,281 INFO L87 Difference]: Start difference. First operand 1439 states and 4735 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:04,765 INFO L93 Difference]: Finished difference Result 1688 states and 5446 transitions. [2021-07-09 17:39:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:04,768 INFO L225 Difference]: With dead ends: 1688 [2021-07-09 17:39:04,768 INFO L226 Difference]: Without dead ends: 1664 [2021-07-09 17:39:04,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-07-09 17:39:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1425. [2021-07-09 17:39:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.2907303370786516) internal successors, (4686), 1424 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4686 transitions. [2021-07-09 17:39:04,784 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4686 transitions. Word has length 25 [2021-07-09 17:39:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:04,785 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4686 transitions. [2021-07-09 17:39:04,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4686 transitions. [2021-07-09 17:39:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:04,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:04,786 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:04,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4262 [2021-07-09 17:39:04,987 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1774874719, now seen corresponding path program 537 times [2021-07-09 17:39:04,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:04,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661716995] [2021-07-09 17:39:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:05,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:05,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661716995] [2021-07-09 17:39:05,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661716995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644472265] [2021-07-09 17:39:05,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:05,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:05,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:05,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,333 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:39:05,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:05,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:05,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:05,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:05,378 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:05,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644472265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:05,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:05,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872749468] [2021-07-09 17:39:05,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:05,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:05,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:05,517 INFO L87 Difference]: Start difference. First operand 1425 states and 4686 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:05,910 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-07-09 17:39:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:06,055 INFO L93 Difference]: Finished difference Result 1619 states and 5212 transitions. [2021-07-09 17:39:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:06,058 INFO L225 Difference]: With dead ends: 1619 [2021-07-09 17:39:06,058 INFO L226 Difference]: Without dead ends: 1591 [2021-07-09 17:39:06,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-07-09 17:39:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1443. [2021-07-09 17:39:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 3.280166435506241) internal successors, (4730), 1442 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 4730 transitions. [2021-07-09 17:39:06,074 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 4730 transitions. Word has length 25 [2021-07-09 17:39:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:06,074 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 4730 transitions. [2021-07-09 17:39:06,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 4730 transitions. [2021-07-09 17:39:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:06,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:06,076 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:06,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4272 [2021-07-09 17:39:06,276 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:06,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1317971693, now seen corresponding path program 538 times [2021-07-09 17:39:06,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:06,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338943562] [2021-07-09 17:39:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:06,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338943562] [2021-07-09 17:39:06,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338943562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6645424] [2021-07-09 17:39:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:06,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:06,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:06,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:06,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:06,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:06,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:06,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,586 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:06,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:06,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:06,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:06,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:06,625 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:06,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6645424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:06,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408960046] [2021-07-09 17:39:06,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:06,782 INFO L87 Difference]: Start difference. First operand 1443 states and 4730 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:07,238 INFO L93 Difference]: Finished difference Result 1717 states and 5575 transitions. [2021-07-09 17:39:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:07,241 INFO L225 Difference]: With dead ends: 1717 [2021-07-09 17:39:07,241 INFO L226 Difference]: Without dead ends: 1717 [2021-07-09 17:39:07,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-07-09 17:39:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1449. [2021-07-09 17:39:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.277624309392265) internal successors, (4746), 1448 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4746 transitions. [2021-07-09 17:39:07,259 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4746 transitions. Word has length 25 [2021-07-09 17:39:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:07,259 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4746 transitions. [2021-07-09 17:39:07,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4746 transitions. [2021-07-09 17:39:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:07,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:07,261 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:07,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4288 [2021-07-09 17:39:07,461 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -97402619, now seen corresponding path program 539 times [2021-07-09 17:39:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:07,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532338316] [2021-07-09 17:39:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:07,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532338316] [2021-07-09 17:39:07,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532338316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376672798] [2021-07-09 17:39:07,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:07,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:07,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:07,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:07,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:07,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:07,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,776 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:07,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:07,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:07,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:07,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:07,815 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:07,956 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1827], 1=[o_0, v_prenex_1826]} [2021-07-09 17:39:07,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:07,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:07,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,009 INFO L628 ElimStorePlain]: treesize reduction 76, result has 38.2 percent of original size [2021-07-09 17:39:08,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:08,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:08,029 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:39:08,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:39:08,032 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:08,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:08,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:08,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:08,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376672798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:08,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:08,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519136696] [2021-07-09 17:39:08,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:08,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:08,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:08,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:08,092 INFO L87 Difference]: Start difference. First operand 1449 states and 4746 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:08,678 INFO L93 Difference]: Finished difference Result 1807 states and 5821 transitions. [2021-07-09 17:39:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:08,682 INFO L225 Difference]: With dead ends: 1807 [2021-07-09 17:39:08,682 INFO L226 Difference]: Without dead ends: 1807 [2021-07-09 17:39:08,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-07-09 17:39:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1456. [2021-07-09 17:39:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.285910652920962) internal successors, (4781), 1455 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4781 transitions. [2021-07-09 17:39:08,699 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4781 transitions. Word has length 25 [2021-07-09 17:39:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:08,700 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 4781 transitions. [2021-07-09 17:39:08,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4781 transitions. [2021-07-09 17:39:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:08,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:08,701 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:08,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4297,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:08,902 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1192101537, now seen corresponding path program 540 times [2021-07-09 17:39:08,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:08,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363026330] [2021-07-09 17:39:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:08,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363026330] [2021-07-09 17:39:08,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363026330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100121077] [2021-07-09 17:39:08,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:09,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:09,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:09,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:09,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:09,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:09,260 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:39:09,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:09,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:09,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:09,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:09,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:09,305 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100121077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128838363] [2021-07-09 17:39:09,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:09,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:09,488 INFO L87 Difference]: Start difference. First operand 1456 states and 4781 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:10,278 INFO L93 Difference]: Finished difference Result 1765 states and 5624 transitions. [2021-07-09 17:39:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:10,282 INFO L225 Difference]: With dead ends: 1765 [2021-07-09 17:39:10,282 INFO L226 Difference]: Without dead ends: 1739 [2021-07-09 17:39:10,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-07-09 17:39:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1483. [2021-07-09 17:39:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.280701754385965) internal successors, (4862), 1482 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 4862 transitions. [2021-07-09 17:39:10,300 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 4862 transitions. Word has length 25 [2021-07-09 17:39:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:10,300 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 4862 transitions. [2021-07-09 17:39:10,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 4862 transitions. [2021-07-09 17:39:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:10,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:10,302 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:10,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4306 [2021-07-09 17:39:10,502 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:10,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1457519359, now seen corresponding path program 541 times [2021-07-09 17:39:10,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:10,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730166823] [2021-07-09 17:39:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:10,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:10,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730166823] [2021-07-09 17:39:10,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730166823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529564014] [2021-07-09 17:39:10,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:10,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:10,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:10,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:10,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:10,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:10,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:10,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:10,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:10,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:10,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:10,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:10,864 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:39:11,025 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1838, o_4], 1=[o_0, v_prenex_1837]} [2021-07-09 17:39:11,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:11,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:11,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:11,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:11,077 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-07-09 17:39:11,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:11,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:11,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:11,097 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:39:11,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1837 vanished before elimination [2021-07-09 17:39:11,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:11,098 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:11,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529564014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:11,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:11,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12832663] [2021-07-09 17:39:11,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:11,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:11,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:11,142 INFO L87 Difference]: Start difference. First operand 1483 states and 4862 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:11,666 INFO L93 Difference]: Finished difference Result 1652 states and 5380 transitions. [2021-07-09 17:39:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:11,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:11,669 INFO L225 Difference]: With dead ends: 1652 [2021-07-09 17:39:11,669 INFO L226 Difference]: Without dead ends: 1652 [2021-07-09 17:39:11,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 525.9ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-07-09 17:39:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1450. [2021-07-09 17:39:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 3.282263630089717) internal successors, (4756), 1449 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4756 transitions. [2021-07-09 17:39:11,685 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4756 transitions. Word has length 25 [2021-07-09 17:39:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:11,685 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 4756 transitions. [2021-07-09 17:39:11,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4756 transitions. [2021-07-09 17:39:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:11,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:11,687 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:11,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4324,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,887 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1457174787, now seen corresponding path program 542 times [2021-07-09 17:39:11,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:11,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579913398] [2021-07-09 17:39:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:11,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579913398] [2021-07-09 17:39:11,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579913398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494554400] [2021-07-09 17:39:11,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:12,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:12,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:12,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:12,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:12,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:12,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,234 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:39:12,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:12,236 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:12,380 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1844], 1=[o_0, v_prenex_1843]} [2021-07-09 17:39:12,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:12,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:12,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,436 INFO L628 ElimStorePlain]: treesize reduction 72, result has 41.5 percent of original size [2021-07-09 17:39:12,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:12,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:12,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:39:12,459 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:12,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:12,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1843 vanished before elimination [2021-07-09 17:39:12,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:12,475 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:12,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494554400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:12,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:12,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347739845] [2021-07-09 17:39:12,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:12,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:12,520 INFO L87 Difference]: Start difference. First operand 1450 states and 4756 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:12,966 INFO L93 Difference]: Finished difference Result 1667 states and 5404 transitions. [2021-07-09 17:39:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:12,969 INFO L225 Difference]: With dead ends: 1667 [2021-07-09 17:39:12,969 INFO L226 Difference]: Without dead ends: 1652 [2021-07-09 17:39:12,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 465.2ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-07-09 17:39:12,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1436. [2021-07-09 17:39:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.2801393728223) internal successors, (4707), 1435 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4707 transitions. [2021-07-09 17:39:12,985 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4707 transitions. Word has length 25 [2021-07-09 17:39:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:12,985 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 4707 transitions. [2021-07-09 17:39:12,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4707 transitions. [2021-07-09 17:39:12,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:12,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:12,987 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:13,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4333,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,187 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:13,187 INFO L82 PathProgramCache]: Analyzing trace with hash -952672539, now seen corresponding path program 543 times [2021-07-09 17:39:13,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:13,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306266850] [2021-07-09 17:39:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:13,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:13,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306266850] [2021-07-09 17:39:13,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306266850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992850237] [2021-07-09 17:39:13,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:13,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:13,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:13,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:13,495 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:13,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:13,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:13,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:13,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:13,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:13,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:13,534 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:13,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992850237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:13,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006345250] [2021-07-09 17:39:13,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:13,704 INFO L87 Difference]: Start difference. First operand 1436 states and 4707 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:14,558 INFO L93 Difference]: Finished difference Result 1868 states and 5981 transitions. [2021-07-09 17:39:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:39:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:14,561 INFO L225 Difference]: With dead ends: 1868 [2021-07-09 17:39:14,561 INFO L226 Difference]: Without dead ends: 1844 [2021-07-09 17:39:14,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 797.7ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-07-09 17:39:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1458. [2021-07-09 17:39:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.299245024021963) internal successors, (4807), 1457 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4807 transitions. [2021-07-09 17:39:14,580 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4807 transitions. Word has length 25 [2021-07-09 17:39:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:14,581 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4807 transitions. [2021-07-09 17:39:14,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4807 transitions. [2021-07-09 17:39:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:14,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:14,582 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:14,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4343 [2021-07-09 17:39:14,783 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:14,783 INFO L82 PathProgramCache]: Analyzing trace with hash -346471653, now seen corresponding path program 544 times [2021-07-09 17:39:14,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:14,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222924126] [2021-07-09 17:39:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:14,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:14,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222924126] [2021-07-09 17:39:14,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222924126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962039263] [2021-07-09 17:39:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:14,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:14,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:14,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:14,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:15,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:15,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:15,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:15,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:15,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:15,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:15,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:15,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:15,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:15,130 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:39:15,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:15,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:15,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962039263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:15,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:15,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907625805] [2021-07-09 17:39:15,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:15,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:15,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:15,305 INFO L87 Difference]: Start difference. First operand 1458 states and 4807 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:15,829 INFO L93 Difference]: Finished difference Result 1928 states and 6149 transitions. [2021-07-09 17:39:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:15,832 INFO L225 Difference]: With dead ends: 1928 [2021-07-09 17:39:15,832 INFO L226 Difference]: Without dead ends: 1928 [2021-07-09 17:39:15,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-09 17:39:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1445. [2021-07-09 17:39:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.2901662049861495) internal successors, (4751), 1444 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4751 transitions. [2021-07-09 17:39:15,851 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4751 transitions. Word has length 25 [2021-07-09 17:39:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:15,851 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 4751 transitions. [2021-07-09 17:39:15,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4751 transitions. [2021-07-09 17:39:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:15,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:15,852 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:16,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4365 [2021-07-09 17:39:16,053 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2007175785, now seen corresponding path program 545 times [2021-07-09 17:39:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:16,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094779170] [2021-07-09 17:39:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:16,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:16,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094779170] [2021-07-09 17:39:16,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094779170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223571499] [2021-07-09 17:39:16,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:16,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:16,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:16,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:16,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:16,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:16,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:16,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:16,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:16,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,430 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.7 percent of original size [2021-07-09 17:39:16,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:16,433 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:16,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223571499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:16,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:16,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664579331] [2021-07-09 17:39:16,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:16,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:16,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:16,567 INFO L87 Difference]: Start difference. First operand 1445 states and 4751 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:17,719 INFO L93 Difference]: Finished difference Result 1920 states and 5978 transitions. [2021-07-09 17:39:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:17,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:17,722 INFO L225 Difference]: With dead ends: 1920 [2021-07-09 17:39:17,722 INFO L226 Difference]: Without dead ends: 1894 [2021-07-09 17:39:17,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1049.7ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-07-09 17:39:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1484. [2021-07-09 17:39:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.2811867835468647) internal successors, (4866), 1483 states have internal predecessors, (4866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4866 transitions. [2021-07-09 17:39:17,743 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4866 transitions. Word has length 25 [2021-07-09 17:39:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:17,743 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4866 transitions. [2021-07-09 17:39:17,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4866 transitions. [2021-07-09 17:39:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:17,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:17,745 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:17,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-07-09 17:39:17,961 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash 269203969, now seen corresponding path program 546 times [2021-07-09 17:39:17,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:17,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389217451] [2021-07-09 17:39:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:18,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:18,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389217451] [2021-07-09 17:39:18,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389217451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031340776] [2021-07-09 17:39:18,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:18,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:18,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:18,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:18,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:18,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:18,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,338 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.7 percent of original size [2021-07-09 17:39:18,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:18,341 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:18,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031340776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:18,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611276019] [2021-07-09 17:39:18,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:18,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:18,477 INFO L87 Difference]: Start difference. First operand 1484 states and 4866 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:19,247 INFO L93 Difference]: Finished difference Result 1767 states and 5637 transitions. [2021-07-09 17:39:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:19,250 INFO L225 Difference]: With dead ends: 1767 [2021-07-09 17:39:19,250 INFO L226 Difference]: Without dead ends: 1729 [2021-07-09 17:39:19,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-07-09 17:39:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1470. [2021-07-09 17:39:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.2838665759019743) internal successors, (4824), 1469 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4824 transitions. [2021-07-09 17:39:19,269 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4824 transitions. Word has length 25 [2021-07-09 17:39:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:19,269 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4824 transitions. [2021-07-09 17:39:19,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4824 transitions. [2021-07-09 17:39:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:19,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:19,271 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:19,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:19,487 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 475496219, now seen corresponding path program 547 times [2021-07-09 17:39:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:19,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704545823] [2021-07-09 17:39:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:19,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:19,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704545823] [2021-07-09 17:39:19,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704545823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885268272] [2021-07-09 17:39:19,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:19,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:19,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:19,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,818 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:19,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:19,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:19,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:19,863 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:20,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885268272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:20,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:20,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145119471] [2021-07-09 17:39:20,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:20,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:20,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:20,044 INFO L87 Difference]: Start difference. First operand 1470 states and 4824 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:20,868 INFO L93 Difference]: Finished difference Result 2008 states and 6309 transitions. [2021-07-09 17:39:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:39:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:20,871 INFO L225 Difference]: With dead ends: 2008 [2021-07-09 17:39:20,871 INFO L226 Difference]: Without dead ends: 2008 [2021-07-09 17:39:20,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-07-09 17:39:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1474. [2021-07-09 17:39:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.2878479293957907) internal successors, (4843), 1473 states have internal predecessors, (4843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4843 transitions. [2021-07-09 17:39:20,893 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4843 transitions. Word has length 25 [2021-07-09 17:39:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:20,893 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 4843 transitions. [2021-07-09 17:39:20,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4843 transitions. [2021-07-09 17:39:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:20,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:20,895 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:21,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4422,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:21,101 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash 488499945, now seen corresponding path program 548 times [2021-07-09 17:39:21,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:21,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016178857] [2021-07-09 17:39:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:21,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:21,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016178857] [2021-07-09 17:39:21,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016178857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443690532] [2021-07-09 17:39:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:21,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:21,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:21,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:21,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,497 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:39:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:21,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:21,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:21,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:21,551 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443690532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:21,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717911412] [2021-07-09 17:39:21,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:21,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:21,730 INFO L87 Difference]: Start difference. First operand 1474 states and 4843 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:22,602 INFO L93 Difference]: Finished difference Result 1891 states and 5968 transitions. [2021-07-09 17:39:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:22,606 INFO L225 Difference]: With dead ends: 1891 [2021-07-09 17:39:22,606 INFO L226 Difference]: Without dead ends: 1875 [2021-07-09 17:39:22,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 805.1ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-09 17:39:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1481. [2021-07-09 17:39:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.287837837837838) internal successors, (4866), 1480 states have internal predecessors, (4866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 4866 transitions. [2021-07-09 17:39:22,626 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 4866 transitions. Word has length 25 [2021-07-09 17:39:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:22,626 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 4866 transitions. [2021-07-09 17:39:22,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 4866 transitions. [2021-07-09 17:39:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:22,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:22,628 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:22,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,844 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:22,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1545136535, now seen corresponding path program 549 times [2021-07-09 17:39:22,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:22,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258088510] [2021-07-09 17:39:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:22,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258088510] [2021-07-09 17:39:22,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258088510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190149949] [2021-07-09 17:39:22,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:22,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:22,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:23,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:23,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,222 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:39:23,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:23,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:23,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:23,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:23,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:23,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190149949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:23,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:23,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791991384] [2021-07-09 17:39:23,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:23,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:23,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:23,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:23,483 INFO L87 Difference]: Start difference. First operand 1481 states and 4866 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:24,323 INFO L93 Difference]: Finished difference Result 1856 states and 5923 transitions. [2021-07-09 17:39:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:24,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:24,327 INFO L225 Difference]: With dead ends: 1856 [2021-07-09 17:39:24,327 INFO L226 Difference]: Without dead ends: 1856 [2021-07-09 17:39:24,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-07-09 17:39:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1480. [2021-07-09 17:39:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 3.292089249492901) internal successors, (4869), 1479 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 4869 transitions. [2021-07-09 17:39:24,346 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 4869 transitions. Word has length 25 [2021-07-09 17:39:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:24,346 INFO L482 AbstractCegarLoop]: Abstraction has 1480 states and 4869 transitions. [2021-07-09 17:39:24,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 4869 transitions. [2021-07-09 17:39:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:24,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:24,348 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:24,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4463 [2021-07-09 17:39:24,548 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1544791963, now seen corresponding path program 550 times [2021-07-09 17:39:24,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:24,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515951402] [2021-07-09 17:39:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:24,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:24,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515951402] [2021-07-09 17:39:24,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515951402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733608825] [2021-07-09 17:39:24,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:24,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:24,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:24,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:24,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:24,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:24,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:24,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:24,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:24,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:24,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:24,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:24,878 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:24,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:24,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:24,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:24,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:24,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:24,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:24,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:24,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:24,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:24,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:25,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733608825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:25,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:25,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305111544] [2021-07-09 17:39:25,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:25,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:25,094 INFO L87 Difference]: Start difference. First operand 1480 states and 4869 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:25,991 INFO L93 Difference]: Finished difference Result 1811 states and 5806 transitions. [2021-07-09 17:39:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:39:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:25,995 INFO L225 Difference]: With dead ends: 1811 [2021-07-09 17:39:25,995 INFO L226 Difference]: Without dead ends: 1796 [2021-07-09 17:39:25,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 823.0ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-07-09 17:39:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1473. [2021-07-09 17:39:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 3.2887228260869565) internal successors, (4841), 1472 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 4841 transitions. [2021-07-09 17:39:26,013 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 4841 transitions. Word has length 25 [2021-07-09 17:39:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:26,014 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 4841 transitions. [2021-07-09 17:39:26,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 4841 transitions. [2021-07-09 17:39:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:26,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:26,015 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:26,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4482 [2021-07-09 17:39:26,216 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1719028705, now seen corresponding path program 551 times [2021-07-09 17:39:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:26,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356046367] [2021-07-09 17:39:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356046367] [2021-07-09 17:39:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356046367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923292439] [2021-07-09 17:39:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:26,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:26,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:26,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:26,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:26,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,585 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:39:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:26,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:26,592 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:26,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:26,630 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:26,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923292439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:26,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:26,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579419591] [2021-07-09 17:39:26,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:26,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:26,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:26,783 INFO L87 Difference]: Start difference. First operand 1473 states and 4841 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:27,280 INFO L93 Difference]: Finished difference Result 1733 states and 5542 transitions. [2021-07-09 17:39:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:27,283 INFO L225 Difference]: With dead ends: 1733 [2021-07-09 17:39:27,283 INFO L226 Difference]: Without dead ends: 1709 [2021-07-09 17:39:27,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 549.4ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-07-09 17:39:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1463. [2021-07-09 17:39:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.2852257181942544) internal successors, (4803), 1462 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4803 transitions. [2021-07-09 17:39:27,301 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4803 transitions. Word has length 25 [2021-07-09 17:39:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:27,301 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4803 transitions. [2021-07-09 17:39:27,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4803 transitions. [2021-07-09 17:39:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:27,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:27,303 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:27,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4500,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:27,503 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:27,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1695665055, now seen corresponding path program 552 times [2021-07-09 17:39:27,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:27,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585771129] [2021-07-09 17:39:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:27,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:27,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585771129] [2021-07-09 17:39:27,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585771129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:27,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60240374] [2021-07-09 17:39:27,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:27,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:39:27,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:27,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:27,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:27,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:27,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:27,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:27,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:27,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,922 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.7 percent of original size [2021-07-09 17:39:27,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:27,925 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:28,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60240374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:28,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:28,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141639699] [2021-07-09 17:39:28,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:28,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:28,092 INFO L87 Difference]: Start difference. First operand 1463 states and 4803 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:28,610 INFO L93 Difference]: Finished difference Result 1703 states and 5504 transitions. [2021-07-09 17:39:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:28,613 INFO L225 Difference]: With dead ends: 1703 [2021-07-09 17:39:28,613 INFO L226 Difference]: Without dead ends: 1703 [2021-07-09 17:39:28,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-07-09 17:39:28,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1441. [2021-07-09 17:39:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 3.283333333333333) internal successors, (4728), 1440 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4728 transitions. [2021-07-09 17:39:28,630 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4728 transitions. Word has length 25 [2021-07-09 17:39:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:28,630 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 4728 transitions. [2021-07-09 17:39:28,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4728 transitions. [2021-07-09 17:39:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:28,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:28,632 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:28,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4518,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:28,832 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:28,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1890078227, now seen corresponding path program 553 times [2021-07-09 17:39:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:28,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556370] [2021-07-09 17:39:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:28,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:28,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556370] [2021-07-09 17:39:28,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116065071] [2021-07-09 17:39:28,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:29,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:29,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:29,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:29,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:29,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:29,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,169 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:39:29,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:29,172 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:29,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116065071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:29,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225858905] [2021-07-09 17:39:29,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:29,320 INFO L87 Difference]: Start difference. First operand 1441 states and 4728 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:29,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:29,905 INFO L93 Difference]: Finished difference Result 1754 states and 5582 transitions. [2021-07-09 17:39:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:29,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:29,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:29,909 INFO L225 Difference]: With dead ends: 1754 [2021-07-09 17:39:29,909 INFO L226 Difference]: Without dead ends: 1730 [2021-07-09 17:39:29,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-09 17:39:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1451. [2021-07-09 17:39:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.2737931034482757) internal successors, (4747), 1450 states have internal predecessors, (4747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4747 transitions. [2021-07-09 17:39:29,927 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4747 transitions. Word has length 25 [2021-07-09 17:39:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:29,927 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4747 transitions. [2021-07-09 17:39:29,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4747 transitions. [2021-07-09 17:39:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:29,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:29,929 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:30,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4535,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:30,129 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:30,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2030506387, now seen corresponding path program 554 times [2021-07-09 17:39:30,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:30,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577716403] [2021-07-09 17:39:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:30,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:30,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577716403] [2021-07-09 17:39:30,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577716403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590624358] [2021-07-09 17:39:30,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:30,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:30,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:30,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:30,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:30,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,457 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:30,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:30,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:30,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:30,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:30,496 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:30,579 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1895, v_prenex_1894, v_prenex_1896, v_prenex_1898], 1=[o_0, v_prenex_1893, v_prenex_1897]} [2021-07-09 17:39:30,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:30,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:30,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,697 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 17:39:30,698 INFO L628 ElimStorePlain]: treesize reduction 119, result has 48.9 percent of original size [2021-07-09 17:39:30,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:30,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:30,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:30,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:30,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:30,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1896 vanished before elimination [2021-07-09 17:39:30,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:30,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:30,825 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:39:30,825 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1893 vanished before elimination [2021-07-09 17:39:30,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:39:30,829 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:30,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:30,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:39:30,874 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 11 variables, input treesize:243, output treesize:56 [2021-07-09 17:39:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:30,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590624358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:30,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:30,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51411422] [2021-07-09 17:39:30,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:30,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:30,947 INFO L87 Difference]: Start difference. First operand 1451 states and 4747 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:31,485 INFO L93 Difference]: Finished difference Result 1700 states and 5466 transitions. [2021-07-09 17:39:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:31,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:31,488 INFO L225 Difference]: With dead ends: 1700 [2021-07-09 17:39:31,489 INFO L226 Difference]: Without dead ends: 1683 [2021-07-09 17:39:31,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 574.7ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-07-09 17:39:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1439. [2021-07-09 17:39:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.2830319888734354) internal successors, (4721), 1438 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4721 transitions. [2021-07-09 17:39:31,506 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4721 transitions. Word has length 25 [2021-07-09 17:39:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:31,507 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 4721 transitions. [2021-07-09 17:39:31,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4721 transitions. [2021-07-09 17:39:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:31,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:31,508 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:31,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4553,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,709 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2005084399, now seen corresponding path program 555 times [2021-07-09 17:39:31,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:31,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302954205] [2021-07-09 17:39:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:31,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:31,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302954205] [2021-07-09 17:39:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302954205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747940490] [2021-07-09 17:39:31,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:31,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:31,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:31,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:31,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:31,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:31,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:31,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:31,991 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:45 [2021-07-09 17:39:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:32,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747940490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:32,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:32,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737199664] [2021-07-09 17:39:32,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:32,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:32,087 INFO L87 Difference]: Start difference. First operand 1439 states and 4721 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:32,475 INFO L93 Difference]: Finished difference Result 1565 states and 5110 transitions. [2021-07-09 17:39:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:32,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:32,478 INFO L225 Difference]: With dead ends: 1565 [2021-07-09 17:39:32,478 INFO L226 Difference]: Without dead ends: 1537 [2021-07-09 17:39:32,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 381.6ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:39:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-07-09 17:39:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1420. [2021-07-09 17:39:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.291050035236082) internal successors, (4670), 1419 states have internal predecessors, (4670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 4670 transitions. [2021-07-09 17:39:32,493 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 4670 transitions. Word has length 25 [2021-07-09 17:39:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:32,493 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 4670 transitions. [2021-07-09 17:39:32,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 4670 transitions. [2021-07-09 17:39:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:32,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:32,495 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:32,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-07-09 17:39:32,695 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash 955114221, now seen corresponding path program 556 times [2021-07-09 17:39:32,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:32,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615984996] [2021-07-09 17:39:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:32,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:32,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615984996] [2021-07-09 17:39:32,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615984996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166552169] [2021-07-09 17:39:32,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:32,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:32,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:32,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:32,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:32,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:32,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:32,970 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:39 [2021-07-09 17:39:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:33,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166552169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:33,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:33,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:33,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071380445] [2021-07-09 17:39:33,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:33,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:33,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:33,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:33,044 INFO L87 Difference]: Start difference. First operand 1420 states and 4670 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:33,307 INFO L93 Difference]: Finished difference Result 1598 states and 5227 transitions. [2021-07-09 17:39:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:33,310 INFO L225 Difference]: With dead ends: 1598 [2021-07-09 17:39:33,310 INFO L226 Difference]: Without dead ends: 1598 [2021-07-09 17:39:33,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:39:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-07-09 17:39:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1420. [2021-07-09 17:39:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.2882311486962648) internal successors, (4666), 1419 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 4666 transitions. [2021-07-09 17:39:33,327 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 4666 transitions. Word has length 25 [2021-07-09 17:39:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:33,327 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 4666 transitions. [2021-07-09 17:39:33,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 4666 transitions. [2021-07-09 17:39:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:33,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:33,329 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:33,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4570,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:33,529 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash 414075235, now seen corresponding path program 557 times [2021-07-09 17:39:33,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:33,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431841383] [2021-07-09 17:39:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:33,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:33,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431841383] [2021-07-09 17:39:33,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431841383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:33,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590369894] [2021-07-09 17:39:33,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:33,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:33,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:33,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:33,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:33,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:33,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:33,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:33,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:33,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:33,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:39 [2021-07-09 17:39:33,875 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1909], 1=[o_0, v_prenex_1908]} [2021-07-09 17:39:33,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:33,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:33,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:33,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:33,930 INFO L628 ElimStorePlain]: treesize reduction 76, result has 38.2 percent of original size [2021-07-09 17:39:33,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:33,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:33,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:33,950 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:39:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:39:33,954 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:33,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:33,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:33,970 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590369894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:34,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:34,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292002800] [2021-07-09 17:39:34,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:34,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:34,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:34,012 INFO L87 Difference]: Start difference. First operand 1420 states and 4666 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:34,420 INFO L93 Difference]: Finished difference Result 1644 states and 5359 transitions. [2021-07-09 17:39:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:34,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:34,423 INFO L225 Difference]: With dead ends: 1644 [2021-07-09 17:39:34,423 INFO L226 Difference]: Without dead ends: 1644 [2021-07-09 17:39:34,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-09 17:39:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1416. [2021-07-09 17:39:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.2840989399293288) internal successors, (4647), 1415 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4647 transitions. [2021-07-09 17:39:34,439 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4647 transitions. Word has length 25 [2021-07-09 17:39:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:34,439 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4647 transitions. [2021-07-09 17:39:34,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4647 transitions. [2021-07-09 17:39:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:34,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:34,441 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:34,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4576,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:34,641 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1554959009, now seen corresponding path program 558 times [2021-07-09 17:39:34,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:34,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058280023] [2021-07-09 17:39:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:34,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:34,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058280023] [2021-07-09 17:39:34,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058280023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605336777] [2021-07-09 17:39:34,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:34,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:34,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:34,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:34,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:34,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:34,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:34,938 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:39:35,015 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1914, o_4], 1=[o_0, v_prenex_1913]} [2021-07-09 17:39:35,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:35,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:35,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:35,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:35,068 INFO L628 ElimStorePlain]: treesize reduction 72, result has 41.5 percent of original size [2021-07-09 17:39:35,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:35,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:35,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:35,087 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:39:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:39:35,090 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:35,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:35,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:35,107 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:35,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605336777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:35,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:35,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185735762] [2021-07-09 17:39:35,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:35,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:35,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:35,139 INFO L87 Difference]: Start difference. First operand 1416 states and 4647 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:35,604 INFO L93 Difference]: Finished difference Result 1605 states and 5202 transitions. [2021-07-09 17:39:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:35,607 INFO L225 Difference]: With dead ends: 1605 [2021-07-09 17:39:35,607 INFO L226 Difference]: Without dead ends: 1597 [2021-07-09 17:39:35,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-07-09 17:39:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1426. [2021-07-09 17:39:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.28) internal successors, (4674), 1425 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4674 transitions. [2021-07-09 17:39:35,623 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4674 transitions. Word has length 25 [2021-07-09 17:39:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:35,623 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4674 transitions. [2021-07-09 17:39:35,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4674 transitions. [2021-07-09 17:39:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:35,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:35,625 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:35,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4582 [2021-07-09 17:39:35,835 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1820376831, now seen corresponding path program 559 times [2021-07-09 17:39:35,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:35,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584364039] [2021-07-09 17:39:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:35,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:35,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584364039] [2021-07-09 17:39:35,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584364039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910291250] [2021-07-09 17:39:35,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:36,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:36,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:36,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:36,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:39:36,206 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1919], 1=[o_0, v_prenex_1918]} [2021-07-09 17:39:36,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:36,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:36,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,258 INFO L628 ElimStorePlain]: treesize reduction 82, result has 33.3 percent of original size [2021-07-09 17:39:36,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:39:36,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:36,277 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-07-09 17:39:36,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1918 vanished before elimination [2021-07-09 17:39:36,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:36,278 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910291250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:36,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:36,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79676390] [2021-07-09 17:39:36,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:36,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:36,321 INFO L87 Difference]: Start difference. First operand 1426 states and 4674 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:36,644 INFO L93 Difference]: Finished difference Result 1568 states and 5123 transitions. [2021-07-09 17:39:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:36,647 INFO L225 Difference]: With dead ends: 1568 [2021-07-09 17:39:36,647 INFO L226 Difference]: Without dead ends: 1568 [2021-07-09 17:39:36,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-07-09 17:39:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1406. [2021-07-09 17:39:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 3.2825622775800714) internal successors, (4612), 1405 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 4612 transitions. [2021-07-09 17:39:36,663 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 4612 transitions. Word has length 25 [2021-07-09 17:39:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:36,663 INFO L482 AbstractCegarLoop]: Abstraction has 1406 states and 4612 transitions. [2021-07-09 17:39:36,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 4612 transitions. [2021-07-09 17:39:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:36,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:36,665 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:36,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4590,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:36,865 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1525997933, now seen corresponding path program 560 times [2021-07-09 17:39:36,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:36,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796126596] [2021-07-09 17:39:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:36,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:36,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796126596] [2021-07-09 17:39:36,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796126596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403667295] [2021-07-09 17:39:36,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:36,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:36,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:37,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:37,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:37,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:37,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:37,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-07-09 17:39:37,243 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1924, o_4], 1=[v_prenex_1923, o_2]} [2021-07-09 17:39:37,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:37,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:37,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,297 INFO L628 ElimStorePlain]: treesize reduction 74, result has 38.8 percent of original size [2021-07-09 17:39:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:37,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:37,316 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1923 vanished before elimination [2021-07-09 17:39:37,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:39:37,319 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:37,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:37,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:37,336 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:37,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403667295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:37,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:37,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308460841] [2021-07-09 17:39:37,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:37,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:37,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:37,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:37,380 INFO L87 Difference]: Start difference. First operand 1406 states and 4612 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:37,767 INFO L93 Difference]: Finished difference Result 1680 states and 5429 transitions. [2021-07-09 17:39:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:37,770 INFO L225 Difference]: With dead ends: 1680 [2021-07-09 17:39:37,770 INFO L226 Difference]: Without dead ends: 1680 [2021-07-09 17:39:37,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-07-09 17:39:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1420. [2021-07-09 17:39:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.294573643410853) internal successors, (4675), 1419 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 4675 transitions. [2021-07-09 17:39:37,786 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 4675 transitions. Word has length 25 [2021-07-09 17:39:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:37,787 INFO L482 AbstractCegarLoop]: Abstraction has 1420 states and 4675 transitions. [2021-07-09 17:39:37,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 4675 transitions. [2021-07-09 17:39:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:37,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:37,788 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:37,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:37,989 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash 431299015, now seen corresponding path program 561 times [2021-07-09 17:39:37,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:37,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821434750] [2021-07-09 17:39:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:38,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:38,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821434750] [2021-07-09 17:39:38,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821434750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301873493] [2021-07-09 17:39:38,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:38,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:38,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:38,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:38,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:38,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:38,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:38,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:38,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:38,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:38,289 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:39 [2021-07-09 17:39:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:38,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301873493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:38,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787960539] [2021-07-09 17:39:38,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:38,383 INFO L87 Difference]: Start difference. First operand 1420 states and 4675 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:38,755 INFO L93 Difference]: Finished difference Result 1740 states and 5593 transitions. [2021-07-09 17:39:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:38,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:38,758 INFO L225 Difference]: With dead ends: 1740 [2021-07-09 17:39:38,758 INFO L226 Difference]: Without dead ends: 1714 [2021-07-09 17:39:38,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-07-09 17:39:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1472. [2021-07-09 17:39:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.29299796057104) internal successors, (4844), 1471 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4844 transitions. [2021-07-09 17:39:38,776 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4844 transitions. Word has length 25 [2021-07-09 17:39:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:38,776 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 4844 transitions. [2021-07-09 17:39:38,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4844 transitions. [2021-07-09 17:39:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:38,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:38,778 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:38,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4604 [2021-07-09 17:39:38,978 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:38,978 INFO L82 PathProgramCache]: Analyzing trace with hash 165881193, now seen corresponding path program 562 times [2021-07-09 17:39:38,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:38,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906272378] [2021-07-09 17:39:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:39,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:39,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906272378] [2021-07-09 17:39:39,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906272378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358122275] [2021-07-09 17:39:39,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:39,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:39,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:39,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:39,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:39,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:39,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:39,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:39,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:39 [2021-07-09 17:39:39,310 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1932], 1=[o_2, v_prenex_1931]} [2021-07-09 17:39:39,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:39,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:39,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,363 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-07-09 17:39:39,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:39,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:39,381 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:39:39,381 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1931 vanished before elimination [2021-07-09 17:39:39,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:39,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:39:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:39,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358122275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:39,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:39,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338445111] [2021-07-09 17:39:39,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:39,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:39,424 INFO L87 Difference]: Start difference. First operand 1472 states and 4844 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:39,898 INFO L93 Difference]: Finished difference Result 1796 states and 5783 transitions. [2021-07-09 17:39:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:39,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:39,901 INFO L225 Difference]: With dead ends: 1796 [2021-07-09 17:39:39,901 INFO L226 Difference]: Without dead ends: 1796 [2021-07-09 17:39:39,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-07-09 17:39:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1448. [2021-07-09 17:39:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.2937111264685557) internal successors, (4766), 1447 states have internal predecessors, (4766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4766 transitions. [2021-07-09 17:39:39,919 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4766 transitions. Word has length 25 [2021-07-09 17:39:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:39,919 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 4766 transitions. [2021-07-09 17:39:39,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4766 transitions. [2021-07-09 17:39:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:39,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:39,920 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:40,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:40,121 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash 166225765, now seen corresponding path program 563 times [2021-07-09 17:39:40,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:40,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409849475] [2021-07-09 17:39:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:40,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409849475] [2021-07-09 17:39:40,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409849475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701590527] [2021-07-09 17:39:40,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:40,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:40,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:40,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:40,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:40,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:40,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:40,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:40,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:40,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:40,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:40,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:45 [2021-07-09 17:39:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701590527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:40,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594224418] [2021-07-09 17:39:40,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:40,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:40,505 INFO L87 Difference]: Start difference. First operand 1448 states and 4766 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:40,910 INFO L93 Difference]: Finished difference Result 1673 states and 5399 transitions. [2021-07-09 17:39:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:40,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:40,913 INFO L225 Difference]: With dead ends: 1673 [2021-07-09 17:39:40,913 INFO L226 Difference]: Without dead ends: 1658 [2021-07-09 17:39:40,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-07-09 17:39:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1441. [2021-07-09 17:39:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 3.290277777777778) internal successors, (4738), 1440 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4738 transitions. [2021-07-09 17:39:40,930 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4738 transitions. Word has length 25 [2021-07-09 17:39:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:40,930 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 4738 transitions. [2021-07-09 17:39:40,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4738 transitions. [2021-07-09 17:39:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:40,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:40,932 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:41,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4623 [2021-07-09 17:39:41,132 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1982915343, now seen corresponding path program 564 times [2021-07-09 17:39:41,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:41,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474323189] [2021-07-09 17:39:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:41,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:41,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474323189] [2021-07-09 17:39:41,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474323189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806766665] [2021-07-09 17:39:41,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:41,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:41,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:41,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:41,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:41,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:41,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:41,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:41,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:41,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:39 [2021-07-09 17:39:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:41,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806766665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:41,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117886501] [2021-07-09 17:39:41,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:41,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:41,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:41,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:41,520 INFO L87 Difference]: Start difference. First operand 1441 states and 4738 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:41,800 INFO L93 Difference]: Finished difference Result 1618 states and 5270 transitions. [2021-07-09 17:39:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:41,802 INFO L225 Difference]: With dead ends: 1618 [2021-07-09 17:39:41,802 INFO L226 Difference]: Without dead ends: 1618 [2021-07-09 17:39:41,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-07-09 17:39:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1413. [2021-07-09 17:39:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.2861189801699715) internal successors, (4640), 1412 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4640 transitions. [2021-07-09 17:39:41,818 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4640 transitions. Word has length 25 [2021-07-09 17:39:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:41,818 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4640 transitions. [2021-07-09 17:39:41,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4640 transitions. [2021-07-09 17:39:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:41,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:41,820 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:42,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4633,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,021 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash -371629813, now seen corresponding path program 565 times [2021-07-09 17:39:42,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:42,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151348602] [2021-07-09 17:39:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:42,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:42,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151348602] [2021-07-09 17:39:42,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151348602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569792592] [2021-07-09 17:39:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:42,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:42,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:42,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:42,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:42,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:42,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:39:42,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:45 [2021-07-09 17:39:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:42,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569792592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:42,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453177387] [2021-07-09 17:39:42,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:42,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:42,378 INFO L87 Difference]: Start difference. First operand 1413 states and 4640 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:42,773 INFO L93 Difference]: Finished difference Result 1548 states and 5041 transitions. [2021-07-09 17:39:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:42,777 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 17:39:42,778 INFO L226 Difference]: Without dead ends: 1518 [2021-07-09 17:39:42,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:39:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-07-09 17:39:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1399. [2021-07-09 17:39:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.283977110157368) internal successors, (4591), 1398 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4591 transitions. [2021-07-09 17:39:42,794 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4591 transitions. Word has length 25 [2021-07-09 17:39:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:42,794 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4591 transitions. [2021-07-09 17:39:42,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4591 transitions. [2021-07-09 17:39:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:42,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:42,795 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:42,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4639 [2021-07-09 17:39:42,996 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:42,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1345395491, now seen corresponding path program 566 times [2021-07-09 17:39:42,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:42,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219921731] [2021-07-09 17:39:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:43,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:43,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219921731] [2021-07-09 17:39:43,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219921731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349103237] [2021-07-09 17:39:43,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:43,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:43,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:43,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:43,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:43,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:43,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:43,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,260 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-07-09 17:39:43,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:39:43,261 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:60 [2021-07-09 17:39:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:43,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349103237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:43,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:43,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972689260] [2021-07-09 17:39:43,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:43,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:43,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:43,381 INFO L87 Difference]: Start difference. First operand 1399 states and 4591 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:44,018 INFO L93 Difference]: Finished difference Result 1796 states and 5797 transitions. [2021-07-09 17:39:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:44,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:44,022 INFO L225 Difference]: With dead ends: 1796 [2021-07-09 17:39:44,022 INFO L226 Difference]: Without dead ends: 1796 [2021-07-09 17:39:44,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 584.2ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-07-09 17:39:44,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1426. [2021-07-09 17:39:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.311578947368421) internal successors, (4719), 1425 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4719 transitions. [2021-07-09 17:39:44,041 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4719 transitions. Word has length 25 [2021-07-09 17:39:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:44,041 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4719 transitions. [2021-07-09 17:39:44,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4719 transitions. [2021-07-09 17:39:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:44,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:44,043 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:44,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4646,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:44,269 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash -141078931, now seen corresponding path program 567 times [2021-07-09 17:39:44,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:44,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143037829] [2021-07-09 17:39:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:44,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:44,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143037829] [2021-07-09 17:39:44,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143037829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967038175] [2021-07-09 17:39:44,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:44,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:44,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:44,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:44,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:44,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:44,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:44,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:44,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:44,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:44,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:44,692 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.7 percent of original size [2021-07-09 17:39:44,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:44,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:44,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967038175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:44,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:44,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119858832] [2021-07-09 17:39:44,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:44,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:44,857 INFO L87 Difference]: Start difference. First operand 1426 states and 4719 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:45,473 INFO L93 Difference]: Finished difference Result 1745 states and 5602 transitions. [2021-07-09 17:39:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:45,477 INFO L225 Difference]: With dead ends: 1745 [2021-07-09 17:39:45,477 INFO L226 Difference]: Without dead ends: 1721 [2021-07-09 17:39:45,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-07-09 17:39:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1418. [2021-07-09 17:39:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.2999294283697953) internal successors, (4676), 1417 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4676 transitions. [2021-07-09 17:39:45,495 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4676 transitions. Word has length 25 [2021-07-09 17:39:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:45,495 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4676 transitions. [2021-07-09 17:39:45,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4676 transitions. [2021-07-09 17:39:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:45,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:45,497 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:45,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4653,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:45,697 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1476197903, now seen corresponding path program 568 times [2021-07-09 17:39:45,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:45,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821053884] [2021-07-09 17:39:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:45,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:45,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821053884] [2021-07-09 17:39:45,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821053884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602598865] [2021-07-09 17:39:45,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:45,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:45,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:45,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:45,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:45,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:45,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:45,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:45,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:45,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:45,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:45,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:45,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:46,045 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:39:46,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:46,048 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:46,142 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1955, o_2, o_4, v_prenex_1951, v_prenex_1953], 1=[v_prenex_1950, v_prenex_1952, v_prenex_1954]} [2021-07-09 17:39:46,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:46,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:46,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:46,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:46,258 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-09 17:39:46,258 INFO L628 ElimStorePlain]: treesize reduction 123, result has 47.2 percent of original size [2021-07-09 17:39:46,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:46,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:46,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:46,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:46,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:46,304 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:39:46,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:46,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:46,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:46,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:46,348 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:46,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:46,383 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1950 vanished before elimination [2021-07-09 17:39:46,383 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1952 vanished before elimination [2021-07-09 17:39:46,383 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1954 vanished before elimination [2021-07-09 17:39:46,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:39:46,385 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:243, output treesize:56 [2021-07-09 17:39:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:46,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602598865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:46,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:46,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:46,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568126520] [2021-07-09 17:39:46,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:46,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:46,458 INFO L87 Difference]: Start difference. First operand 1418 states and 4676 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:47,348 INFO L93 Difference]: Finished difference Result 1930 states and 6017 transitions. [2021-07-09 17:39:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:47,352 INFO L225 Difference]: With dead ends: 1930 [2021-07-09 17:39:47,352 INFO L226 Difference]: Without dead ends: 1904 [2021-07-09 17:39:47,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-07-09 17:39:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1470. [2021-07-09 17:39:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.298842750170184) internal successors, (4846), 1469 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4846 transitions. [2021-07-09 17:39:47,372 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4846 transitions. Word has length 25 [2021-07-09 17:39:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:47,372 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4846 transitions. [2021-07-09 17:39:47,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4846 transitions. [2021-07-09 17:39:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:47,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:47,373 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:47,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4671 [2021-07-09 17:39:47,574 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1080797577, now seen corresponding path program 569 times [2021-07-09 17:39:47,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:47,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489508072] [2021-07-09 17:39:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:47,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489508072] [2021-07-09 17:39:47,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489508072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472285146] [2021-07-09 17:39:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:47,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:47,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:47,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:47,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:47,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:47,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:47,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:47,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:47,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:47,796 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-07-09 17:39:47,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:39:47,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:48 [2021-07-09 17:39:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:47,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472285146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:47,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:47,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131644545] [2021-07-09 17:39:47,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:47,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:47,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:47,881 INFO L87 Difference]: Start difference. First operand 1470 states and 4846 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:48,356 INFO L93 Difference]: Finished difference Result 1777 states and 5676 transitions. [2021-07-09 17:39:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:48,360 INFO L225 Difference]: With dead ends: 1777 [2021-07-09 17:39:48,360 INFO L226 Difference]: Without dead ends: 1739 [2021-07-09 17:39:48,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-07-09 17:39:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1458. [2021-07-09 17:39:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.301990391214825) internal successors, (4811), 1457 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4811 transitions. [2021-07-09 17:39:48,378 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4811 transitions. Word has length 25 [2021-07-09 17:39:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:48,378 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4811 transitions. [2021-07-09 17:39:48,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4811 transitions. [2021-07-09 17:39:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:48,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:48,380 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4681 [2021-07-09 17:39:48,580 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1287089827, now seen corresponding path program 570 times [2021-07-09 17:39:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903019525] [2021-07-09 17:39:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:48,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:48,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903019525] [2021-07-09 17:39:48,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903019525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862623744] [2021-07-09 17:39:48,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:48,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:39:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:48,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:48,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:48,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:48,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:48,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:48,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:48,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:48,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:48,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:49,006 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.7 percent of original size [2021-07-09 17:39:49,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:49,009 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862623744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:49,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:49,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376560087] [2021-07-09 17:39:49,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:49,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:49,172 INFO L87 Difference]: Start difference. First operand 1458 states and 4811 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,457 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 17:39:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:50,024 INFO L93 Difference]: Finished difference Result 1977 states and 6245 transitions. [2021-07-09 17:39:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:50,032 INFO L225 Difference]: With dead ends: 1977 [2021-07-09 17:39:50,032 INFO L226 Difference]: Without dead ends: 1977 [2021-07-09 17:39:50,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 746.0ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-07-09 17:39:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1465. [2021-07-09 17:39:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.30396174863388) internal successors, (4837), 1464 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4837 transitions. [2021-07-09 17:39:50,053 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4837 transitions. Word has length 25 [2021-07-09 17:39:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:50,054 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4837 transitions. [2021-07-09 17:39:50,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4837 transitions. [2021-07-09 17:39:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:50,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:50,055 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:50,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-07-09 17:39:50,261 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1300093553, now seen corresponding path program 571 times [2021-07-09 17:39:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:50,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002392250] [2021-07-09 17:39:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:50,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002392250] [2021-07-09 17:39:50,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002392250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421975738] [2021-07-09 17:39:50,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:50,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:50,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:50,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,624 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:50,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:50,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:50,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:50,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:50,670 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:50,755 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1967, v_prenex_1969, o_4, v_prenex_1965, v_prenex_1964], 1=[v_prenex_1966, o_2, v_prenex_1968]} [2021-07-09 17:39:50,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:50,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:50,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,870 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-09 17:39:50,871 INFO L628 ElimStorePlain]: treesize reduction 123, result has 47.2 percent of original size [2021-07-09 17:39:50,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:50,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:50,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:50,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:50,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:50,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:50,964 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:50,998 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1964 vanished before elimination [2021-07-09 17:39:50,998 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1966 vanished before elimination [2021-07-09 17:39:50,998 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:39:50,998 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1968 vanished before elimination [2021-07-09 17:39:51,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:39:51,000 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:243, output treesize:56 [2021-07-09 17:39:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421975738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:51,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340698093] [2021-07-09 17:39:51,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:51,096 INFO L87 Difference]: Start difference. First operand 1465 states and 4837 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:51,670 INFO L93 Difference]: Finished difference Result 1903 states and 6034 transitions. [2021-07-09 17:39:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:51,674 INFO L225 Difference]: With dead ends: 1903 [2021-07-09 17:39:51,674 INFO L226 Difference]: Without dead ends: 1887 [2021-07-09 17:39:51,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-07-09 17:39:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1477. [2021-07-09 17:39:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.3069105691056913) internal successors, (4881), 1476 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4881 transitions. [2021-07-09 17:39:51,694 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4881 transitions. Word has length 25 [2021-07-09 17:39:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:51,694 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4881 transitions. [2021-07-09 17:39:51,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4881 transitions. [2021-07-09 17:39:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:51,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:51,696 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:51,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4709 [2021-07-09 17:39:51,897 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:51,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:51,897 INFO L82 PathProgramCache]: Analyzing trace with hash -733542927, now seen corresponding path program 572 times [2021-07-09 17:39:51,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:51,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301787175] [2021-07-09 17:39:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:51,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:51,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301787175] [2021-07-09 17:39:51,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301787175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866153810] [2021-07-09 17:39:51,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:52,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:52,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:52,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:52,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:52,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,266 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:39:52,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:52,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:52,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:52,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:52,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:52,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866153810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:52,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:52,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:52,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618805245] [2021-07-09 17:39:52,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:52,491 INFO L87 Difference]: Start difference. First operand 1477 states and 4881 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:53,119 INFO L93 Difference]: Finished difference Result 1926 states and 6131 transitions. [2021-07-09 17:39:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:53,123 INFO L225 Difference]: With dead ends: 1926 [2021-07-09 17:39:53,123 INFO L226 Difference]: Without dead ends: 1926 [2021-07-09 17:39:53,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-07-09 17:39:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1468. [2021-07-09 17:39:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3101567825494205) internal successors, (4856), 1467 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4856 transitions. [2021-07-09 17:39:53,143 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4856 transitions. Word has length 25 [2021-07-09 17:39:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:53,143 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4856 transitions. [2021-07-09 17:39:53,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4856 transitions. [2021-07-09 17:39:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:53,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:53,145 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:53,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4719,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:53,357 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash -733198355, now seen corresponding path program 573 times [2021-07-09 17:39:53,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:53,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629729146] [2021-07-09 17:39:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:53,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:53,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629729146] [2021-07-09 17:39:53,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629729146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526969704] [2021-07-09 17:39:53,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:53,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:53,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:53,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:53,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:53,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:53,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:53,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:53,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-07-09 17:39:53,826 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1980, v_prenex_1982, v_prenex_1984], 1=[o_2, v_prenex_1979, v_prenex_1981, v_prenex_1983]} [2021-07-09 17:39:53,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:53,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:39:53,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,966 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-09 17:39:53,966 INFO L628 ElimStorePlain]: treesize reduction 131, result has 51.3 percent of original size [2021-07-09 17:39:53,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:53,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:54,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:54,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:39:54,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:54,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:39:54,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:54,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:54,157 INFO L628 ElimStorePlain]: treesize reduction 19, result has 80.2 percent of original size [2021-07-09 17:39:54,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:54,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:39:54,161 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:54,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:54,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1979 vanished before elimination [2021-07-09 17:39:54,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1981 vanished before elimination [2021-07-09 17:39:54,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1983 vanished before elimination [2021-07-09 17:39:54,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:39:54,196 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:281, output treesize:47 [2021-07-09 17:39:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:54,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526969704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:54,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:54,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:54,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888322953] [2021-07-09 17:39:54,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:54,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:54,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:54,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:54,295 INFO L87 Difference]: Start difference. First operand 1468 states and 4856 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:54,534 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-07-09 17:39:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:55,021 INFO L93 Difference]: Finished difference Result 1857 states and 5911 transitions. [2021-07-09 17:39:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:55,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:55,024 INFO L225 Difference]: With dead ends: 1857 [2021-07-09 17:39:55,025 INFO L226 Difference]: Without dead ends: 1842 [2021-07-09 17:39:55,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-07-09 17:39:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1461. [2021-07-09 17:39:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.3068493150684932) internal successors, (4828), 1460 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4828 transitions. [2021-07-09 17:39:55,044 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4828 transitions. Word has length 25 [2021-07-09 17:39:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:55,044 INFO L482 AbstractCegarLoop]: Abstraction has 1461 states and 4828 transitions. [2021-07-09 17:39:55,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4828 transitions. [2021-07-09 17:39:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:55,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:55,046 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:55,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4736 [2021-07-09 17:39:55,262 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:55,263 INFO L82 PathProgramCache]: Analyzing trace with hash -907435097, now seen corresponding path program 574 times [2021-07-09 17:39:55,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:55,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751646340] [2021-07-09 17:39:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:55,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751646340] [2021-07-09 17:39:55,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751646340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658239658] [2021-07-09 17:39:55,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:55,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:55,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:55,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:55,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:55,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:55,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:55,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:55,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,615 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:39:55,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:55,617 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:55,701 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_1990, v_prenex_1992, v_prenex_1994], 1=[v_prenex_1989, v_prenex_1991, v_prenex_1993]} [2021-07-09 17:39:55,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:55,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:55,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,812 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 17:39:55,812 INFO L628 ElimStorePlain]: treesize reduction 124, result has 44.9 percent of original size [2021-07-09 17:39:55,813 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-07-09 17:39:55,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:55,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:55,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:55,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:55,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:39:55,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:55,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1989 vanished before elimination [2021-07-09 17:39:55,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1991 vanished before elimination [2021-07-09 17:39:55,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1993 vanished before elimination [2021-07-09 17:39:55,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:39:55,933 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 11 variables, input treesize:243, output treesize:56 [2021-07-09 17:39:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658239658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:56,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:56,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123392649] [2021-07-09 17:39:56,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:56,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:56,024 INFO L87 Difference]: Start difference. First operand 1461 states and 4828 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:56,678 INFO L93 Difference]: Finished difference Result 1866 states and 5945 transitions. [2021-07-09 17:39:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:56,681 INFO L225 Difference]: With dead ends: 1866 [2021-07-09 17:39:56,682 INFO L226 Difference]: Without dead ends: 1836 [2021-07-09 17:39:56,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 688.9ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-07-09 17:39:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1472. [2021-07-09 17:39:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.3127124405166555) internal successors, (4873), 1471 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4873 transitions. [2021-07-09 17:39:56,701 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4873 transitions. Word has length 25 [2021-07-09 17:39:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:56,701 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 4873 transitions. [2021-07-09 17:39:56,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4873 transitions. [2021-07-09 17:39:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:56,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:56,702 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:56,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4750 [2021-07-09 17:39:56,903 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1787708633, now seen corresponding path program 575 times [2021-07-09 17:39:56,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:56,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128786175] [2021-07-09 17:39:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:56,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:56,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128786175] [2021-07-09 17:39:56,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128786175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107822985] [2021-07-09 17:39:56,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:57,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:57,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:57,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:57,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:57,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:57,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:57,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:57,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:57,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:57,249 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:39:57,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:57,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:39:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:39:57,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107822985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:57,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:57,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:39:57,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51866068] [2021-07-09 17:39:57,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:39:57,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:39:57,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:57,428 INFO L87 Difference]: Start difference. First operand 1472 states and 4873 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:58,352 INFO L93 Difference]: Finished difference Result 1888 states and 6017 transitions. [2021-07-09 17:39:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:39:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:58,357 INFO L225 Difference]: With dead ends: 1888 [2021-07-09 17:39:58,358 INFO L226 Difference]: Without dead ends: 1888 [2021-07-09 17:39:58,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 877.6ms TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-07-09 17:39:58,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1450. [2021-07-09 17:39:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 3.30503795721187) internal successors, (4789), 1449 states have internal predecessors, (4789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4789 transitions. [2021-07-09 17:39:58,377 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4789 transitions. Word has length 25 [2021-07-09 17:39:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:58,377 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 4789 transitions. [2021-07-09 17:39:58,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4789 transitions. [2021-07-09 17:39:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:58,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:58,378 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:58,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4760 [2021-07-09 17:39:58,579 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1078484619, now seen corresponding path program 576 times [2021-07-09 17:39:58,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:58,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400470177] [2021-07-09 17:39:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:58,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:58,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400470177] [2021-07-09 17:39:58,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400470177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127996285] [2021-07-09 17:39:58,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:58,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:58,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:39:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:58,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:39:58,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:58,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:58,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:58,945 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:39:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:39:58,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:58,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:39:58,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:58,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:58,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:39:58,999 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:39:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:39:59,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127996285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:59,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:59,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663958990] [2021-07-09 17:39:59,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:59,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:59,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:59,141 INFO L87 Difference]: Start difference. First operand 1450 states and 4789 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:59,891 INFO L93 Difference]: Finished difference Result 1816 states and 5747 transitions. [2021-07-09 17:39:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:59,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:39:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:59,894 INFO L225 Difference]: With dead ends: 1816 [2021-07-09 17:39:59,894 INFO L226 Difference]: Without dead ends: 1792 [2021-07-09 17:39:59,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 708.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-07-09 17:39:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1460. [2021-07-09 17:39:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.295407813570939) internal successors, (4808), 1459 states have internal predecessors, (4808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4808 transitions. [2021-07-09 17:39:59,914 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4808 transitions. Word has length 25 [2021-07-09 17:39:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:59,914 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 4808 transitions. [2021-07-09 17:39:59,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4808 transitions. [2021-07-09 17:39:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:39:59,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:59,916 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:00,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4777,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:00,116 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1218912779, now seen corresponding path program 577 times [2021-07-09 17:40:00,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:00,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308625840] [2021-07-09 17:40:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:00,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:00,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308625840] [2021-07-09 17:40:00,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308625840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059196666] [2021-07-09 17:40:00,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:00,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:40:00,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:00,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:00,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,504 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-07-09 17:40:00,504 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:40:00,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:00,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:00,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:00,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:00,550 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:40:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:00,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059196666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:00,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:00,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815052259] [2021-07-09 17:40:00,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:00,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:00,695 INFO L87 Difference]: Start difference. First operand 1460 states and 4808 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:01,520 INFO L93 Difference]: Finished difference Result 1762 states and 5631 transitions. [2021-07-09 17:40:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:40:01,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:01,523 INFO L225 Difference]: With dead ends: 1762 [2021-07-09 17:40:01,523 INFO L226 Difference]: Without dead ends: 1745 [2021-07-09 17:40:01,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:40:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2021-07-09 17:40:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1449. [2021-07-09 17:40:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.304558011049724) internal successors, (4785), 1448 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4785 transitions. [2021-07-09 17:40:01,541 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4785 transitions. Word has length 25 [2021-07-09 17:40:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:01,541 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4785 transitions. [2021-07-09 17:40:01,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4785 transitions. [2021-07-09 17:40:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:01,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:01,543 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:01,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4795,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:01,745 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash -816813213, now seen corresponding path program 578 times [2021-07-09 17:40:01,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:01,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281988981] [2021-07-09 17:40:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:01,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281988981] [2021-07-09 17:40:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281988981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314088387] [2021-07-09 17:40:01,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:01,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:01,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:40:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:02,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:02,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,125 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:40:02,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:02,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:02,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:02,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:02,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:40:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:02,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314088387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:02,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055400961] [2021-07-09 17:40:02,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:02,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:02,354 INFO L87 Difference]: Start difference. First operand 1449 states and 4785 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:02,628 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-09 17:40:03,016 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-07-09 17:40:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:03,143 INFO L93 Difference]: Finished difference Result 1707 states and 5522 transitions. [2021-07-09 17:40:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:03,146 INFO L225 Difference]: With dead ends: 1707 [2021-07-09 17:40:03,146 INFO L226 Difference]: Without dead ends: 1707 [2021-07-09 17:40:03,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 794.8ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-07-09 17:40:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1450. [2021-07-09 17:40:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 3.298136645962733) internal successors, (4779), 1449 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4779 transitions. [2021-07-09 17:40:03,164 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4779 transitions. Word has length 25 [2021-07-09 17:40:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:03,164 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 4779 transitions. [2021-07-09 17:40:03,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4779 transitions. [2021-07-09 17:40:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:03,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:03,166 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:03,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4815,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:03,366 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1022342671, now seen corresponding path program 579 times [2021-07-09 17:40:03,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:03,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463772705] [2021-07-09 17:40:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:03,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:03,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463772705] [2021-07-09 17:40:03,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463772705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:03,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611038443] [2021-07-09 17:40:03,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:03,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:40:03,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:03,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:03,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:03,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,717 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:40:03,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:03,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:03,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:03,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:03,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:40:03,887 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_2016], 1=[o_2, v_prenex_2015]} [2021-07-09 17:40:03,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:40:03,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:40:03,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,965 INFO L628 ElimStorePlain]: treesize reduction 82, result has 33.3 percent of original size [2021-07-09 17:40:03,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:40:03,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:03,984 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:40:03,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2015 vanished before elimination [2021-07-09 17:40:03,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:03,985 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:40:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:04,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611038443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:04,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:40:04,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202477435] [2021-07-09 17:40:04,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:04,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:04,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:04,032 INFO L87 Difference]: Start difference. First operand 1450 states and 4779 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:04,623 INFO L93 Difference]: Finished difference Result 1864 states and 5969 transitions. [2021-07-09 17:40:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:04,626 INFO L225 Difference]: With dead ends: 1864 [2021-07-09 17:40:04,626 INFO L226 Difference]: Without dead ends: 1864 [2021-07-09 17:40:04,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:40:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-07-09 17:40:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1446. [2021-07-09 17:40:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3038062283737024) internal successors, (4774), 1445 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4774 transitions. [2021-07-09 17:40:04,647 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4774 transitions. Word has length 25 [2021-07-09 17:40:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:04,647 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4774 transitions. [2021-07-09 17:40:04,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4774 transitions. [2021-07-09 17:40:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:04,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:04,649 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:04,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4832,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:04,849 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash -404080503, now seen corresponding path program 580 times [2021-07-09 17:40:04,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:04,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941034701] [2021-07-09 17:40:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:04,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:04,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941034701] [2021-07-09 17:40:04,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941034701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121618323] [2021-07-09 17:40:04,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:04,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:04,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:40:04,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:05,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:05,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:05,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,191 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:40:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:05,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:05,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:05,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:05,233 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:40:05,388 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-07-09 17:40:05,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:05,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:05,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,413 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-07-09 17:40:05,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:40:05,416 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:05,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:05,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,422 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:40:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:05,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121618323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:05,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:40:05,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103835574] [2021-07-09 17:40:05,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:05,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:05,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:05,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:05,452 INFO L87 Difference]: Start difference. First operand 1446 states and 4774 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:06,022 INFO L93 Difference]: Finished difference Result 1746 states and 5671 transitions. [2021-07-09 17:40:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:06,026 INFO L225 Difference]: With dead ends: 1746 [2021-07-09 17:40:06,026 INFO L226 Difference]: Without dead ends: 1746 [2021-07-09 17:40:06,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 571.3ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:40:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-07-09 17:40:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1446. [2021-07-09 17:40:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3038062283737024) internal successors, (4774), 1445 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4774 transitions. [2021-07-09 17:40:06,044 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4774 transitions. Word has length 25 [2021-07-09 17:40:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:06,044 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4774 transitions. [2021-07-09 17:40:06,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4774 transitions. [2021-07-09 17:40:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:06,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:06,046 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:06,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4841,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:06,246 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:06,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1207205027, now seen corresponding path program 581 times [2021-07-09 17:40:06,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:06,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026801642] [2021-07-09 17:40:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:06,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:06,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026801642] [2021-07-09 17:40:06,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026801642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825962789] [2021-07-09 17:40:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:06,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:40:06,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:06,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:40:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:06,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:06,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:06,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,615 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:40:06,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:06,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:06,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:06,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:06,666 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:40:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:06,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825962789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:06,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:06,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273768943] [2021-07-09 17:40:06,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:06,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:06,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:06,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:06,860 INFO L87 Difference]: Start difference. First operand 1446 states and 4774 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:07,453 INFO L93 Difference]: Finished difference Result 1591 states and 5188 transitions. [2021-07-09 17:40:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:40:07,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:07,456 INFO L225 Difference]: With dead ends: 1591 [2021-07-09 17:40:07,456 INFO L226 Difference]: Without dead ends: 1561 [2021-07-09 17:40:07,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-07-09 17:40:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1439. [2021-07-09 17:40:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.3004172461752432) internal successors, (4746), 1438 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4746 transitions. [2021-07-09 17:40:07,472 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4746 transitions. Word has length 25 [2021-07-09 17:40:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:07,472 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 4746 transitions. [2021-07-09 17:40:07,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4746 transitions. [2021-07-09 17:40:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:07,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:07,474 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:07,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4848 [2021-07-09 17:40:07,674 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash 227123999, now seen corresponding path program 582 times [2021-07-09 17:40:07,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:07,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946249269] [2021-07-09 17:40:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:07,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946249269] [2021-07-09 17:40:07,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946249269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:07,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372769008] [2021-07-09 17:40:07,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:07,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:40:07,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:07,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:40:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:07,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:07,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:07,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:07,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:07,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,907 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-07-09 17:40:07,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:40:07,909 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:48 [2021-07-09 17:40:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:08,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372769008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:08,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:08,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882880743] [2021-07-09 17:40:08,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:08,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:08,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:08,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:08,002 INFO L87 Difference]: Start difference. First operand 1439 states and 4746 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:08,403 INFO L93 Difference]: Finished difference Result 1678 states and 5395 transitions. [2021-07-09 17:40:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:08,406 INFO L225 Difference]: With dead ends: 1678 [2021-07-09 17:40:08,406 INFO L226 Difference]: Without dead ends: 1654 [2021-07-09 17:40:08,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-07-09 17:40:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1439. [2021-07-09 17:40:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.2948539638386647) internal successors, (4738), 1438 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4738 transitions. [2021-07-09 17:40:08,425 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4738 transitions. Word has length 25 [2021-07-09 17:40:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:08,425 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 4738 transitions. [2021-07-09 17:40:08,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4738 transitions. [2021-07-09 17:40:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:08,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:08,427 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:08,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4863 [2021-07-09 17:40:08,627 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash -653149537, now seen corresponding path program 583 times [2021-07-09 17:40:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:08,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350961385] [2021-07-09 17:40:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:08,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:08,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350961385] [2021-07-09 17:40:08,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350961385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617083752] [2021-07-09 17:40:08,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:08,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:40:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:08,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:08,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:08,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:08,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,994 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:40:08,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:08,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:40:09,117 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2030, o_4], 1=[o_2, v_prenex_2029]} [2021-07-09 17:40:09,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:09,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:09,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,172 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-07-09 17:40:09,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:40:09,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:09,192 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:40:09,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:40:09,195 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:09,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:09,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:09,214 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:40:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:09,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617083752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:09,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:09,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:40:09,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239264918] [2021-07-09 17:40:09,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:09,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:09,266 INFO L87 Difference]: Start difference. First operand 1439 states and 4738 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:09,874 INFO L93 Difference]: Finished difference Result 1747 states and 5604 transitions. [2021-07-09 17:40:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:40:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:09,878 INFO L225 Difference]: With dead ends: 1747 [2021-07-09 17:40:09,878 INFO L226 Difference]: Without dead ends: 1747 [2021-07-09 17:40:09,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 653.4ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-07-09 17:40:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1423. [2021-07-09 17:40:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.2939521800281293) internal successors, (4684), 1422 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4684 transitions. [2021-07-09 17:40:09,896 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4684 transitions. Word has length 25 [2021-07-09 17:40:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:09,896 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 4684 transitions. [2021-07-09 17:40:09,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4684 transitions. [2021-07-09 17:40:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:09,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:09,898 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:10,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:10,099 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash 168818335, now seen corresponding path program 584 times [2021-07-09 17:40:10,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:10,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350359007] [2021-07-09 17:40:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:10,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350359007] [2021-07-09 17:40:10,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350359007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116931722] [2021-07-09 17:40:10,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:10,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:10,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:10,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:40:10,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:10,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:10,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:10,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:10,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:10,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:10,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:10,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:10,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:10,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:10,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:10,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,498 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-07-09 17:40:10,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:10,501 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:113, output treesize:68 [2021-07-09 17:40:10,631 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-07-09 17:40:10,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:10,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:10,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,655 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-07-09 17:40:10,655 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:40:10,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:40:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:10,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116931722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:10,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:40:10,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532998061] [2021-07-09 17:40:10,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:10,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:10,678 INFO L87 Difference]: Start difference. First operand 1423 states and 4684 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:11,147 INFO L93 Difference]: Finished difference Result 1614 states and 5249 transitions. [2021-07-09 17:40:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:40:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:11,150 INFO L225 Difference]: With dead ends: 1614 [2021-07-09 17:40:11,150 INFO L226 Difference]: Without dead ends: 1614 [2021-07-09 17:40:11,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-09 17:40:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1402. [2021-07-09 17:40:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.2897930049964312) internal successors, (4609), 1401 states have internal predecessors, (4609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4609 transitions. [2021-07-09 17:40:11,168 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4609 transitions. Word has length 25 [2021-07-09 17:40:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:11,168 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4609 transitions. [2021-07-09 17:40:11,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4609 transitions. [2021-07-09 17:40:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:11,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:11,170 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:11,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4883,585 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:11,370 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1919918351, now seen corresponding path program 585 times [2021-07-09 17:40:11,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:11,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540689896] [2021-07-09 17:40:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:11,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540689896] [2021-07-09 17:40:11,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540689896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172596544] [2021-07-09 17:40:11,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:11,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:40:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:11,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:11,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:11,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,766 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-07-09 17:40:11,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:11,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:11,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:11,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:11,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:125, output treesize:80 [2021-07-09 17:40:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:40:11,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172596544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:11,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655407763] [2021-07-09 17:40:11,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:11,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:11,948 INFO L87 Difference]: Start difference. First operand 1402 states and 4609 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,242 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 17:40:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:12,608 INFO L93 Difference]: Finished difference Result 1582 states and 5087 transitions. [2021-07-09 17:40:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:12,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:40:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:12,611 INFO L225 Difference]: With dead ends: 1582 [2021-07-09 17:40:12,611 INFO L226 Difference]: Without dead ends: 1558 [2021-07-09 17:40:12,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-07-09 17:40:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1424. [2021-07-09 17:40:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.276177090653549) internal successors, (4662), 1423 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4662 transitions. [2021-07-09 17:40:12,627 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4662 transitions. Word has length 25 [2021-07-09 17:40:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:12,627 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 4662 transitions. [2021-07-09 17:40:12,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4662 transitions. [2021-07-09 17:40:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:40:12,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:12,629 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:12,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-07-09 17:40:12,829 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1779490191, now seen corresponding path program 586 times [2021-07-09 17:40:12,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:12,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855039637] [2021-07-09 17:40:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:12,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:12,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855039637] [2021-07-09 17:40:12,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855039637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:12,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849617300] [2021-07-09 17:40:12,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:12,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:40:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:13,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:13,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:40:13,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:13,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:13,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:40:13,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:13,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:40:13,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-07-09 17:40:13,238 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-07-09 17:40:13,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4906 [2021-07-09 17:40:13,438 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:40:13,440 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:40:13,441 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:40:13,442 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:40:13 BasicIcfg [2021-07-09 17:40:13,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:40:13,442 INFO L168 Benchmark]: Toolchain (without parser) took 848633.97 ms. Allocated memory was 170.9 MB in the beginning and 619.7 MB in the end (delta: 448.8 MB). Free memory was 149.6 MB in the beginning and 241.4 MB in the end (delta: -91.8 MB). Peak memory consumption was 359.3 MB. Max. memory is 8.0 GB. [2021-07-09 17:40:13,442 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 170.9 MB. Free memory is still 150.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:40:13,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.95 ms. Allocated memory is still 170.9 MB. Free memory was 149.5 MB in the beginning and 148.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:40:13,442 INFO L168 Benchmark]: Boogie Preprocessor took 14.73 ms. Allocated memory is still 170.9 MB. Free memory was 148.1 MB in the beginning and 147.1 MB in the end (delta: 937.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:40:13,442 INFO L168 Benchmark]: RCFGBuilder took 366.41 ms. Allocated memory is still 170.9 MB. Free memory was 147.0 MB in the beginning and 123.7 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:40:13,442 INFO L168 Benchmark]: TraceAbstraction took 848219.28 ms. Allocated memory was 170.9 MB in the beginning and 619.7 MB in the end (delta: 448.8 MB). Free memory was 123.3 MB in the beginning and 241.4 MB in the end (delta: -118.2 MB). Peak memory consumption was 332.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:40:13,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 170.9 MB. Free memory is still 150.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.95 ms. Allocated memory is still 170.9 MB. Free memory was 149.5 MB in the beginning and 148.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.73 ms. Allocated memory is still 170.9 MB. Free memory was 148.1 MB in the beginning and 147.1 MB in the end (delta: 937.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 366.41 ms. Allocated memory is still 170.9 MB. Free memory was 147.0 MB in the beginning and 123.7 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 848219.28 ms. Allocated memory was 170.9 MB in the beginning and 619.7 MB in the end (delta: 448.8 MB). Free memory was 123.3 MB in the beginning and 241.4 MB in the end (delta: -118.2 MB). Peak memory consumption was 332.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 50ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 848107.1ms, OverallIterations: 602, TraceHistogramMax: 5, EmptinessCheckTime: 875.9ms, AutomataDifference: 332001.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36063 SDtfs, 56260 SDslu, 239488 SDs, 0 SdLazy, 259437 SolverSat, 13202 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 124200.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23864 GetRequests, 9995 SyntacticMatches, 1221 SemanticMatches, 12648 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51116 ImplicationChecksByTransitivity, 357873.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1486occurred in iteration=516, InterpolantAutomatonStates: 8628, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9150.7ms AutomataMinimizationTime, 601 MinimizatonAttempts, 166721 StatesRemovedByMinimization, 597 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2956.7ms SsaConstructionTime, 7809.6ms SatisfiabilityAnalysisTime, 364848.9ms InterpolantComputationTime, 28612 NumberOfCodeBlocks, 28524 NumberOfCodeBlocksAsserted, 2092 NumberOfCheckSat, 27426 ConstructedInterpolants, 2537 QuantifiedInterpolants, 547445 SizeOfPredicates, 5414 NumberOfNonLiveVariables, 63982 ConjunctsInSsa, 13584 ConjunctsInUnsatCore, 1186 InterpolantComputations, 16 PerfectInterpolantSequences, 9105/20348 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown